Grandstream Networks, Inc.
DP750/DP720
DECT Cordless IP Phones
User Guide
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DP750/DP720 User Guide
Version 1.0.15.6
COPYRIGHT
©2021 Grandstream Networks, Inc. http://www.grandstream.com
All rights reserved. Information in this document is subject to change without notice. Reproduction or
transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose without
the express written permission of Grandstream Networks, Inc. is not permitted.
The latest electronic version of this user manual is available for download here:
http://www.grandstream.com/support
Grandstream is a registered trademark and Grandstream logo is trademark of Grandstream Networks, Inc.
in the United States, Europe and other countries.
CAUTION
Changes or modifications to this product not expressly approved by Grandstream, or operation of this product
in any way other than as detailed by this User Manual, could void your manufacturer warranty.
WARNING
Please do not use a different power adaptor with your devices as it may cause damage to the products and
void the manufacturer warranty.
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DP750/DP720 User Guide
Version 1.0.15.6
FCC Warning
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation. Any Changes or modifications not expressly
approved by the party responsible for compliance could void the user's authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
FCC Exposure to Radio Frequency (RF) Signals
For Handset
This is a radio transmitter and receiver. It is designed and manufactured not to exceed the emission limits for
exposure to radio frequency (RF) energy set by the Federal Communications Commission (FCC) of the U.S.
Government. These limits are part of comprehensive guidelines and establish permitted levels of RF energy
for the general population. The guidelines are based on the safety standards previously set by both U.S. and
international standards bodies. These standards include a substantial safety margin designed to assure the
safety of all persons, regardless of age and health. This device and its antenna must not be collocated or
operating in conjunction with any other antenna or transmitter. This product has been shown to be capable
of compliance for localized specific absorption rate (SAR) for uncontrolled environment/general population
exposure limits specified in ANSI/IEEE Std. C95.1-1992 and had been tested in accordance with the
measurement procedures specified in FCC/OET Bulletin 65 Supplement C (2001) and IEEE 1528.
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DP750/DP720 User Guide
Version 1.0.15.6
For Base
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Operating Frequency Band (RF):
DECT: 1881.792 MHz - 1897.344 MHz (TX/RX)
Modulation Mode:
DECT: GFSK
Max. Of Transmit Power:
DP720
DP750
23.5 dBm
22.95 dBm
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DP750/DP720 User Guide
Version 1.0.15.6
GNU GPL INFORMATION
DP750 firmware contains third-party software licensed under the GNU General Public License (GPL).
Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public License
(GPL) for the exact terms and conditions of the license.
Grandstream GNU GPL related source code can be downloaded from Grandstream web site from:
http://www.grandstream.com/support/faq/gnu-general-public-license/gnu-gpl-information-download
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DP750/DP720 User Guide
Version 1.0.15.6
Table of Content
DOCUMENT PURPOSE .................................................................................................. 11
CHANGE LOG ................................................................................................................. 12
Firmware Version 1.0.15.6 ...................................................................................................................... 12
Firmware Version 1.0.15.3 ...................................................................................................................... 12
Firmware Version 1.0.15.2 ...................................................................................................................... 12
Firmware Version 1.0.13.8 ...................................................................................................................... 12
Firmware Version 1.0.13.0 ...................................................................................................................... 12
Firmware Version 1.0.11.12 .................................................................................................................... 12
Firmware Version 1.0.11.4 ...................................................................................................................... 13
Firmware Version 1.0.11.2 ...................................................................................................................... 13
Firmware Version 1.0.9.9 ........................................................................................................................ 13
Firmware Version 1.0.9.1 ........................................................................................................................ 13
Firmware Version 1.0.7.5 ........................................................................................................................ 13
Firmware Version 1.0.4.10 ...................................................................................................................... 13
Firmware Version 1.0.4.7 ........................................................................................................................ 13
Firmware Version 1.0.4.2 ........................................................................................................................ 13
Firmware Version 1.0.3.40 ...................................................................................................................... 13
Firmware Version 1.0.3.37 ...................................................................................................................... 14
Firmware Version 1.0.3.31 ...................................................................................................................... 14
Firmware Version 1.0.3.23 ...................................................................................................................... 14
Firmware Version 1.0.2.16 ...................................................................................................................... 14
Firmware Version 1.0.1.14 ...................................................................................................................... 14
Firmware Version 1.0.1.4 ........................................................................................................................ 15
Firmware Version 1.0.0.16 ...................................................................................................................... 15
GUI INTERFACE EXAMPLES ......................................................................................... 16
WELCOME ...................................................................................................................... 17
PRODUCT OVERVIEW ................................................................................................... 18
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DP750/DP720 User Guide
Version 1.0.15.6
Feature Highlights ................................................................................................................................... 18
DP750 Technical Specifications .............................................................................................................. 18
DP720 Technical Specifications .............................................................................................................. 20
GETTING STARTED ........................................................................................................ 22
Equipment Packaging ............................................................................................................................. 22
Connecting DP750 .................................................................................................................................. 23
Connecting via AC power ................................................................................................................ 23
Connecting via PoE ......................................................................................................................... 23
Setting up DP720 handset ...................................................................................................................... 24
Battery Information .......................................................................................................................... 24
Setting up the Charge Station ................................................................................................................. 25
DP750 LED Patterns............................................................................................................................... 25
DP720 Handset Description ................................................................................................................... 26
DP720 Icons Description ........................................................................................................................ 27
DP720 Handset Menu............................................................................................................................. 29
BASIC OPERATIONS ...................................................................................................... 35
Turning the Handset ON / OFF ............................................................................................................... 35
Setup Wizard .......................................................................................................................................... 35
Register DP720 Handset to DP750 Base Station .................................................................................. 35
Using DP720 with Multiple DP750 Base Stations .................................................................................. 36
Registering DP720 to an additional DP750 base station ................................................................ 36
Switching Between Different Base Stations .................................................................................... 37
Unregister the DP720 ............................................................................................................................. 37
Obtain DP750 Base Station IP Address via paired DP720 ..................................................................... 38
Key Lock ................................................................................................................................................. 39
Locating a DP720 Handset from DP750 Base station ............................................................................ 39
Locate via DP750 Web UI ............................................................................................................... 39
Locate via DP750 Base station ....................................................................................................... 40
Checking System Status ......................................................................................................................... 40
Basic Network Settings ........................................................................................................................... 41
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DP750/DP720 User Guide
Version 1.0.15.6
Change Menu and LCD Timeout ............................................................................................................ 42
Return to Idle Screen .............................................................................................................................. 42
Register a SIP Account ........................................................................................................................... 43
Register Account via Web User Interface ........................................................................................ 43
PHONE SETTINGS.......................................................................................................... 46
Editing the Handset’s name .................................................................................................................... 46
Changing the Base PIN Code ................................................................................................................. 47
Selecting Phone Language ..................................................................................................................... 48
Activate/Deactivate Hands-Free Mode ................................................................................................... 49
Muting the Microphone ........................................................................................................................... 49
Adjusting Speaker and Earpiece Volume ............................................................................................... 49
Ringtones ................................................................................................................................................ 49
Setting the Ringer Volume on the Handset ..................................................................................... 49
Setting the Ringer Melody on the Handset ...................................................................................... 50
Advisory Tones ................................................................................................................................ 51
Ringtones Customization ................................................................................................................. 51
Date and Time ......................................................................................................................................... 54
Outgoing Default Line ............................................................................................................................. 55
Factory Functions ................................................................................................................................... 55
DP720 Handset Firmware Upgrade ........................................................................................................ 57
Reboot DP750 Base Station ................................................................................................................... 57
Reset DP720 Handset ............................................................................................................................ 58
CALL OPERATIONS ....................................................................................................... 59
Placing calls ............................................................................................................................................ 59
Make a Call using a Line ................................................................................................................. 59
Dialing from Call history ................................................................................................................... 60
Dialing from Phonebook .................................................................................................................. 60
Intercommunication ......................................................................................................................... 61
Answering Calls ...................................................................................................................................... 61
Auto Answer ..................................................................................................................................... 62
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DP750/DP720 User Guide
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Off-Cradle Pickup ............................................................................................................................ 62
Ending Calls ............................................................................................................................................ 63
On-Cradle Hang-up ......................................................................................................................... 63
Rejecting Calls ........................................................................................................................................ 63
Direct IP Call ........................................................................................................................................... 63
Call Hold/Resume ................................................................................................................................... 64
Call Waiting ............................................................................................................................................. 64
Do Not Disturb ........................................................................................................................................ 65
Call Forward ............................................................................................................................................ 66
Paging ..................................................................................................................................................... 66
Call Transfer ............................................................................................................................................ 66
Blind Transfer ................................................................................................................................... 67
Attended Transfer ............................................................................................................................ 67
Transfer between handsets ............................................................................................................. 67
Speed Dial .............................................................................................................................................. 67
3-Way Conference .................................................................................................................................. 68
Voice Mail ................................................................................................................................................ 68
Set Voice Mail Feature Code ........................................................................................................... 68
Play Voice Mail Messages ............................................................................................................... 69
PTT (Push-To-Talk) ................................................................................................................................. 69
Call Features ........................................................................................................................................... 71
RESTORE FACTORY DEFAULT SETTINGS .................................................................. 73
EXPERIENCING DP750/DP720 ...................................................................................... 74
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DP750/DP720 User Guide
Version 1.0.15.6
Table of Tables
Table 1: DP750 Features at a Glance ............................................................................................................ 18
Table 2: DP720 Features at a Glance ............................................................................................................ 18
Table 3: DP750 Technical Specifications ....................................................................................................... 19
Table 4: DP720 Technical Specifications ....................................................................................................... 20
Table 5: Equipment Packaging ...................................................................................................................... 22
Table 6: DP750 Led Patterns ......................................................................................................................... 25
Table 7: Handset Keys Description ................................................................................................................ 26
Table 8: DP720 Icons Description .................................................................................................................. 27
Table 9: DP720 Info description ..................................................................................................................... 40
Table 10: Call Features .................................................................................................................................. 71
Table of Figures
Figure 1: DP750 Package Content ................................................................................................................ 22
Figure 2: DP720 Package Content ................................................................................................................ 22
Figure 3: DP750 Back View ........................................................................................................................... 23
Figure 4: Connecting the Base station ........................................................................................................... 23
Figure 5: Setting up the DP720 ...................................................................................................................... 24
Figure 6: Setting up the charge station .......................................................................................................... 25
Figure 7: Handset Keys Description .............................................................................................................. 26
Figure 8: DP720 Menu Structure ................................................................................................................... 30
Figure 9: DECT Status - Subscribe ................................................................................................................ 35
Figure 10: Registration process ..................................................................................................................... 36
Figure 11: Multiple Base Stations Registration .............................................................................................. 37
Figure 12: Switching Between Base Stations ................................................................................................ 37
Figure 13: Unregister DP720 from DP750 web UI ......................................................................................... 38
Figure 14: Locate Handset via Web UI .......................................................................................................... 40
Figure 15: Network Settings configuration ..................................................................................................... 42
Figure 16: SIP Settings .................................................................................................................................. 44
Figure 17: SIP Accounts Settings................................................................................................................... 45
Figure 18: Account Status .............................................................................................................................. 45
Figure 19: Handset Name editing .................................................................................................................. 46
Figure 20: Edit Handset Name from DP750 .................................................................................................. 47
Figure 21: Changing Admin Base PIN Code from DP720 ............................................................................. 47
Figure 22: Changing Admin Base PIN Code from DP750 ............................................................................. 48
Figure 23: Handset Language ....................................................................................................................... 48
Figure 24: Ringer Volume .............................................................................................................................. 50
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DP750/DP720 User Guide
Version 1.0.15.6
Figure 25: Calls Ringtones ............................................................................................................................. 50
Figure 26: Advisory Tone ................................................................................................................................ 51
Figure 27: Generating Custom Ringtone (Windows) ..................................................................................... 52
Figure 28: Downloading Custom Ringtones .................................................................................................. 53
Figure 29: Custom Ringtone on DP750 ......................................................................................................... 54
Figure 30: Date and Time Settings ................................................................................................................ 55
Figure 31: Factory Functions ......................................................................................................................... 56
Figure 32: New Firmware Available Notification ............................................................................................ 57
Figure 33: Firmware Upgrade ........................................................................................................................ 57
Figure 34: Rebooting the Base Station .......................................................................................................... 58
Figure 35: Resetting the Base Station ........................................................................................................... 58
Figure 36: Shortcut Setting ............................................................................................................................ 61
Figure 37: Enabling PTT and assigning a softkey to it .................................................................................. 70
Figure 38: PTT Call Establishment ................................................................................................................ 70
Figure 39: PTT Transmission ......................................................................................................................... 71
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DP750/DP720 User Guide
Version 1.0.15.6
DOCUMENT PURPOSE
This document describes the basic concept and tasks necessary to use and configure your DP720 via the
LCD menu and also using the DP750 base station. And it covers the handset installation, basic operations
and call features. Please visit http://www.grandstream.com/support to download the latest “DP750/DP720
User Guide”.
This guide covers following topics:
• Product Overview
• Getting Started
• Basic Operations
• Phone settings
• Call Operations
• Restore Factory Default Settings
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DP750/DP720 User Guide
Version 1.0.15.6
CHANGE LOG
This section documents significant changes from previous versions of user guide for DP750/DP720. Only
major new features or major document updates are listed here. Minor updates for corrections or editing are
not documented here.
Firmware Version 1.0.15.6
• No major changes.
Firmware Version 1.0.15.3
• No major changes
Firmware Version 1.0.15.2
• Add support to input provisioning server username and password on handset UI when base station is
trying to download a config file from a password protected server.
• Added support to delete a paired base station from the handset.
Firmware Version 1.0.13.8
• Added support for handsets to internally page other handsets without accounts registered. [Paging][Call
Features]
• Updated the CPE to 1.0.1.141 to better support GDMS.
Firmware Version 1.0.13.0
• No major changes
Firmware Version 1.0.11.12
• Added support for Intercom feature. [Intercommunication]
• Added support for transfer between HS internally without SIP. [Transfer between handsets]
• Added option for blind transfer and attended transfer. [The DP720 supports paging other handsets
internally without having any sip Account registered. Similarly, to the base station paging button, Inter-
Handsets paging features enables handsets to ring other handsets. The feature can be enabled from
LCD menu → Call Features → paging.
• Call Transfer]
• Added DP720 charging current displaying. [Factory Functions]
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DP750/DP720 User Guide
Version 1.0.15.6
Firmware Version 1.0.11.4
• No major changes
Firmware Version 1.0.11.2
• Added Chile time zone.
Firmware Version 1.0.9.9
• Added support to configure Voice Mail access number on DP75X web UI. [Voice Mail Access Number]
Firmware Version 1.0.9.1
• Added support for Intercom feature. [Intercommunication]
Firmware Version 1.0.7.5
• Changed DP720 GUI to new design with new style.
• Added support for Push-to-Talk for DP720. [PTT (Push-To-Talk)]
• Disable DP720 auto upgrade to 1.0.7.X or above.
• Improved DP720 built-in ringtones.
Firmware Version 1.0.4.10
• No major changes.
Firmware Version 1.0.4.7
• Added the ability to display Account Name only. [SIP Account Display]
• Added SRTP icon on handset UI. [Table 8: DP720 Icons Description]
• Updated German translations for both DP750 Web UI and DP720 handset UI.
Firmware Version 1.0.4.2
• Added support for DP720 to use Audio Loopback test when it is not registered to the base station. [Audio
loopback]
• Play keypad tone during the call if it is enabled. [Advisory Tones]
Firmware Version 1.0.3.40
• Increased the number of digits that can be dialed on the handset (23 digits).
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DP750/DP720 User Guide
Version 1.0.15.6
Firmware Version 1.0.3.37
• No major changes
Firmware Version 1.0.3.31
• Added language support for Slovakian, Swedish. [Multi-language]
Firmware Version 1.0.3.23
• Removed Tools/alarm menu from DP720 GUI, replaced by Status menu. [Status]
• Added keypad tones for non DTMF keys on DP720.
• Added subscribe softkey in idle screen if HS no subscribed on DP720. [Subscribe softkey]
• Added the ability to customize DP720 ringtones. [Ringtones Customization]
• Added DP720 walk through setup wizard after factory reset. [Setup Wizard]
• Added support for more languages and updated translation.
• Added DP720 factory reset combo key to be able to recover the device during booting up. [DP720
factory reset using combo key]
Firmware Version 1.0.2.16
• Re-arranged the Handset Menu Settings. [DP720 Handset Menu]
• Changed menu “Line Status” in Call Settings to “Lines”.
• Changed menu “Number” in set voice Mail to “VM Access Number”.
• Added headset detection and icon for DP720 dial mode screen. [DP720 Icons Description]
• Added ability to bridge conference before third party answers. [3-Way Conference]
• Added ability to reboot from DP720 handset. [Reboot DP750 Base Station]
• Improved alarm snooze icon.
• Added DP720 LCD auto turn on feature when pickup from or reposition to charger.
• Added + button support for keypad dialing. [DP720 Handset Description] [Make a Call using a Line]
• Improved support for Czech, Dutch, German, Hebrew, Japanese, Korean, Turkish languages.
Firmware Version 1.0.1.14
• Added snooze time settings for alarm function.
• Added snooze icon.
• Updated alarm icon.
• Removed IVR (Interactive Voice Response).
• Added contact name to delete confirmation.
• Added use Line from Contacts when dialing out of phonebook. [Dialing from Phonebook]
• Added VM, missed calls, headset icon. [DP720 Icons Description]
• Removed “Intercom” feature.
• Removed “Internal Call” from audio ring tone menu.
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DP750/DP720 User Guide
Version 1.0.15.6
• Adjusted Call History and Contacts menu architecture. [DP720 Handset Menu]
• Moved "Edit Dial" option to last one in Call History and Contacts menu option. [Dialing from Call
history] [Dialing from Phonebook]
• Hide empty fields when displaying contact info.
• Hide icon after press back key in idle misses call or VM alert screen.
• Moved “Standard ring” to last one of ring tone list. [Ringtones]
• Missed Call can be dialed back via related SIP profile using softkey. [Dialing from Call history]
Firmware Version 1.0.1.4
• Added Call and Delete softkeys during off-hook dial. [Placing calls]
• Added left softkey for Voice mail alert window to enter the Play Message window. [Play Voice Mail
Messages]
• Added Display line name info immediately after off-hook. [Placing calls]
• Changed to only press ESC key to show factory menu.
• Added Dial number immediately after off-hook.
• Added Dialing GUI enhancements.
• Added ability to configure menu key timeout. [Change Menu and LCD Timeout]
• Added Handset will prompt “Saved successfully” if configuring call forward settings in ring group.
• Added advisory tone for handset put in and out of cradle.
• Added ability to configure menu key timeout.
• Added when last name is none use the first name for speed dial record name.
• Added when handset enter IVR, press RSK hold key will delete dial number.
• Added stop dial tone if first key not number key after off hook
Firmware Version 1.0.0.16
• This is the initial version for DP750/DP720.
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DP750/DP720 User Guide
Version 1.0.15.6
GUI INTERFACE EXAMPLES
http://www.grandstream.com/sites/default/files/Resources/dp750_web_gui.zip
1. Screenshot of Login Page
2. Screenshots of Status Pages
3. Screenshots of Profiles Pages
4. Screenshots of DECT Pages
5. Screenshots of Settings Pages
6. Screenshots of Maintenance Pages
7. Screenshots of Phonebook Pages
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DP750/DP720 User Guide
Version 1.0.15.6
WELCOME
Thank you for purchasing Grandstream DP750 DECT IP Base Station and DP720 DECT Handset.
The DP750 is a powerful DECT VoIP base station that pairs with up to 5 of Grandstream’s DP720 DECT
handsets to offer mobility to business and residential users. It supports a range of 300 meters outdoors and
50 meters indoors to give users the freedom to move around their work or home space, delivering efficient
flexibility. This DECT VoIP base station supports up to 10 SIP accounts and 5 concurrent calls while also
offering 3-way voice conferencing, full HD audio and integrated PoE. A shared SIP account on all handsets
will add seamless unified features that gives users the ability to answer all calls regardless of location in real-
time. The DP750 supports a variety of auto-provisioning methods and TLS/SRTP/ HTTPS encryption security.
When paired with Grandstream’s DP720, the DP750 offers a powerful DECT VoIP base station that allows
any business or residential user to create a cordless VoIP solution.
The DP720 is a DECT cordless VoIP phone that allows users to mobilize their VoIP network throughout any
business, warehouse, retail store and residential environment. It is supported by Grandstream’s DP750 DECT
VoIP base station and delivers a combination of mobility and top-notch telephony performance. Up to five
DP720 handsets are supported on each DP750 while each DP720 supports a range of up to 300 meters
outdoors and 50 meters indoors from the base station. The DP720 touts a suite of top-notch telephony
features including support for up to 10 SIP accounts and two concurrent calls per handset, full HD audio, a
3.5mm headset jack, multi-language support, a speakerphone and more. When paired with Grandstream’s
DP750 DECT Base Station, the DP720 offers a powerful DECT VoIP handset that allows any business or
residential user to create a cordless VoIP solution.
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DP750/DP720 User Guide
Version 1.0.15.6
PRODUCT OVERVIEW
Feature Highlights
The following tables contain the major features of the DP750 / DP720:
Table 1: DP750 Features at a Glance
Table 2: DP720 Features at a Glance
DP750 Technical Specifications
The following table resumes all the technical specifications including the protocols / standards supported,
voice codecs, telephony features, languages and upgrade/provisioning settings for the Base station DP750.
DP750
5 handsets.
10 accounts.
10 lines.
5 concurrent calls.
PoE power support.
300m range outdoor / 50m range indoor.
DP720
DECT cordless HD.
1.8 inch (128x160) TFT color LCD.
250 hours standby / 20 hours talk time.
15 languages embedded.
10 accounts.
10 lines.
2 concurrent calls
5 ring modes.
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DP750/DP720 User Guide
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Table 3: DP750 Technical Specifications
Air Interface
Telephony standards: DECT
Frequency bands:
▪ 1880 – 1900 MHz (Europe), 1920 – 1930 MHz (US)
▪ 1910 – 1920 MHz (Brazil), 1786 – 1792 MHz (Korea)
▪ 1893 – 1906 MHz (Japan), 1880 – 1895 MHz (Taiwan)
Number of channels: 10 (Europe), 5 (US, Brazil or Japan), 3 (Korea), 8 (Taiwan)
Range: up to 300 meters outdoor and 50 meters indoor
Peripherals
5 LED indicators: Power, Network, Register, Call, DECT
Reset button, Pairing/Paging button
One 10/100 Mbps auto-sensing Ethernet port with integrated PoE
Protocols/Standards
SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS
(A record, SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDP-
MED, LDAP, TR-069, 802.1x, TLS, SRTP, IPv6 (pending)
Voice Codecs
G.711µ/a-law, G.723.1, G.729A/B, G.726-32, iLBC, G.722, OPUS, G.722.2/AMR-
WB (special order), in-band and out-of-band DTMF (in audio, RFC2833, SIP
INFO), VAD, CNG, PLC, AJB
Telephony Features
Hold, transfer, forward, 3-way conference, downloadable phonebook (XML, LDAP,
up to 3000 entries), call waiting, call log (up to 300 records), auto answer, flexible
dial plan, music on hold, server redundancy and fail-over
Sample
Applications
Currency (pending)
QoS
Layer 2 QoS (802.1Q, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
Security
User and administrator level access control, MD5 and MD5-sess based
authentication, 256-bit AES encrypted configuration file, TLS, SRTP, HTTPS,
802.1x media access control, DECT authentication & encryption
Multi-language
English, Czech, German, Spanish, French, Arabic, Hebrew, Italian, Russian,
Netherlands, Japanese, Polish, Chinese Simple, Chinese Tradition, Korean,
Portuguese, Slovakian, Serbian, Swedish and Turkish.
Upgrade/
Provisioning
Firmware upgrade via TFTP/HTTP/HTTPS, mass provisioning using TR-069 or
AES encrypted XML configuration file
Multiple SIP
Accounts
Up to ten (10) distinct SIP accounts per system
Each handset may map to any SIP account(s)
Each SIP account may map to any handset(s)
Ring Group
Flexible options when multiple handsets share the same SIP account
▪ Circular Mode: all phones ring sequentially, starting with the phone after
the one which rang last.
▪ Linear Mode: all phones ring sequentially in the predetermined order,
starting with the first phone each time.
▪ Parallel Mode: all phones ring concurrently; after one phone answers, the
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DP750/DP720 User Guide
Version 1.0.15.6
remaining available phones can make new calls
Power & Green
Energy Efficiency
Universal Power Supply Input AC 100-240V 50/60Hz; Output 5VDC, 1A; Micro-
USB connection; PoE: IEEE802.3af Class 1, 0.44W–3.84W
Package Content
Base unit, Universal Power Supply, Ethernet cable, Quick Installation Guide, GPL
Statement
Dimensions
28.5 mm (H) x 130 mm (W) x 90 mm (D)
Weight
Base unit: 143g, Universal Power Supply: 50g; Package: 360g
Temperature
and Humidity
Operation: -10º to 55ºC (14 to 131ºF); Storage: -20º to 60ºC (-4 to 140ºF);
Humidity: 10% to 90% non-condensing
Compliance
FCC: Part 15D, 47 CFR 2.1093, Part 15B
CE: EN60950; EN301489-1-6; EN301406
RCM: AS/NZS60950
ANATEL: #2288-16-9452
DP720 Technical Specifications
The following table resumes all the technical specifications including the protocols / standards supported,
voice codecs, telephony features, languages and upgrade/provisioning settings for the DP720 handset.
Table 4: DP720 Technical Specifications
Air Interface
Telephony standards: DECT
Frequency bands:
▪ 1880 – 1900 MHz (Europe), 1920 – 1930 MHz (US)
▪ 1910 – 1920 MHz (Brazil), 1786 – 1792 MHz (Korea)
▪ 1893 – 1906 MHz (Japan), 1880 – 1895 MHz (Taiwan)
Number of channels: 10 (Europe), 5 (US, Brazil or Japan), 3 (Korea), 8 (Taiwan)
Range: up to 300 meters outdoor and 50 meters indoor
Peripherals
1.8 inch (128x160) color TFT LCD
23 keys including 2 softkeys, 5 navigation / menu keys, 4 dedicated function keys
for SEND, POWER/END, SPEAKERPHONE, MUTE
3-color MWI LED
3.5mm headset jack
Removable belt clip
Micro-USB port for alternative charging and non-battery operation
Protocols/Standards
Hearing Aid Compatibility (HAC) compliant
Voice Codecs
G.722 codec for HD audio and G.726 codec for narrow band audio (G.711μ/a-law,
G.723.1, G.729A/B, iLBC and OPUS are supported via companion DECT base
station DP750), AEC, AGC, Ambient noise reduction
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Telephony Features
Hold, transfer, forward, 3-way conference, call park, call pickup, downloadable
phonebook, call waiting, call log, auto answer, click-to-dial, flexible dial plan, music
on hold
Sample
Applications
Currency (pending)
HD Audio
Yes, in both Handset and Speakerphone modes
Security
DECT authentication & encryption
Multi-language
English, Czech, German, Spanish, French, Hebrew, Italian, Netherlands,
Japanese, Chinese, Chinese simple, Polish, Russian, Chinese Simple, Chinese
Tradition, Korean, Portuguese, Slovakian, Serbian, Swedish, Turkish and Arabic.
Upgrade/
Provisioning
Software Upgrade Over-The-Air (SUOTA), handset provisioning Over-The-Air
Multiple Line
Access
Each handset may access up to 10 lines
Power & Green
Energy Efficiency
Universal Power Supply Input AC 100-240V 50/60Hz; Output 5VDC 1A; Micro-USB
connection; Rechargeable 800mAh Ni-MH Low Self-Discharge (LSD) AAA
batteries (250 hours of standby time and 20 hours of talk time)
Package Content
Handset unit, universal power supply, charger cradle, belt clip, 2 batteries, Quick
Installation Guide
Dimensions
(H x W x D)
Handset: 155 x 50 x 26 mm, charger cradle: 35 x 63.5 x 54 mm
Weight
Handset: 138g, charger cradle: 71g, universal power supply: 50g; Package: 360g
Temperature
and Humidity
Operation: -10º to 50ºC (14 to 122ºF); Charging: 0 to 45ºC (32 to 113ºF); Storage:
-20º to 60ºC (-4 to 140ºF); Humidity: 10% to 90% non-condensing
Compliance
FCC: Part 15D; 47 CFR 2.1093 & IEEE1528-2013, Part68, Part 15B
CE: EN60950; EN301489-1-6; EN301406; EN50360; EN62209-1
RCM: AS/NZS60950; AS/ACIF S004
ANATEL: #2288-16-9452
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GETTING STARTED
This chapter provides basic installation instructions including the list of the packaging contents and also
information for obtaining the best performance with the DP720 IP DECT phone and its base station DP750.
Equipment Packaging
Table 5: Equipment Packaging
Figure 1: DP750 Package Content
Figure 2: DP720 Package Content
Note: Check the package before installation. If you find anything missing, contact your system administrator.
DP720
DP750
• 1 Handset unit
• 1 Universal power supply 5V
• 1 Charger cradle
• 1 Belt clip
• 2 Rechargeable batteries
• 1 Quick Installation Guide
• 1 Base unit
• 1 Universal power supply 5V
• 1 Ethernet cable
• 1 Quick Installation Guide
• 1 GPL Statement
2x Rechargeable
Batteries
1x DP720 Handset
1x Charge Station
1x Quick Installation Guide
1x GPL Statement
1x 5V Power Adapter
1x Handset Belt Clip
1x DP750 Base Station
1x 5V Power Adapter
1x Ethernet Cable
1x Quick Installation Guide
1x GPL Statement
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Connecting DP750
To setup the DP750 Base Station, please follow the steps below:
Figure 3: DP750 Back View
You have two options for power and network connection of the base station: AC power or Power over Ethernet
(PoE)
Note: For better signal range, we recommend to install DP750 horizontally with LED side facing toward the
usage area. For example, if you just put it on a desk, the LED better face up, if you mount it on the ceiling, it
better LED face down, in both cases, it toward the space area.
Connecting via AC power
1. Connect the micro-USB connector into the related port on the base station and connect the other end
of the power adapter into an electrical power outlet.
2. Connect the supplied Ethernet cable between the Internet port on the base station and the Internet
port in your network or the switch/hub device port.
Figure 4: Connecting the Base station
Connecting via PoE
To connect the base station using PoE, you need to connect the Ethernet cable provided (or 3rd party
network cable) between the Network Socket on the base station to Ethernet port of your PoE switch/hub.
Reset Button
Power Input
Radio / Page Button
Network Socket
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Setting up DP720 handset
Please follow below steps to insert batteries into the handset:
1. Open the battery compartment cover.
2. Insert the batteries in the correct polarity.
3. Close the battery compartment cover.
Note: Please charge the batteries fully before using the handset for the first time
Figure 5: Setting up the DP720
Battery Information
• Technology: Nickel Metal Hydride (Ni-MH)
• Size: AAA
• Voltage: 1.2V
• Capacity: 800mAh
• Charging time: 12 hours from empty to full
• Standby time: up to 250 hours
• Talk time: up to 20 hours’ active talk time
In order to get the best performance of your DP720 handset, we recommend using original batteries provided
in the package or batteries compliant with above specifications.
The specifications may differ depending on the age and capacity of the batteries used.
Important Note: Be careful when inserting the batteries into your handset to avoid any risk of short-circuit,
which lead to damage your batteries and/or the handset itself. Do not use damaged batteries which can
increase the risk of serious harm.
1
2
3
1. Battery compartment cover
2.
Batteries
3.
Rear of handset
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Setting up the Charge Station
Please refer to the following steps for setting up the charge station and charging the handset:
1. Connect the DC plug on the power adapter to the micro-USB connector on the charge station.
2. Connect the other end of the power adapter into an electrical power outlet.
3. After setting up the handset and the charge station, place the handset in the charge station.
Figure 6: Setting up the charge station
DP750 LED Patterns
The DP750 has 5 LED lights on it. Please see on the following table the meaning of each light.
Table 6: DP750 Led Patterns
LED Light
Status
Indicates power ON/OFF
Indicates access to the Network. Remains ON while there is Access to the Network
Indicates if a SIP account is registered
Indicates status of the lines.
Blinking: A line is in use. Solid ON: All lines are free.
The radio icon for pairing the DP720 and DP750, if we keep pressing the radio button it
starts blinking indicating pairing attempt.
1 2 3
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DP720 Handset Description
The LCD screen and the keypad are the main hardware components of the DP720.
Figure 7: Handset Keys Description
Table 7: Handset Keys Description
Key
Description
1.
Power and Charging
Indication Light
Red: Charging. Green: Charge completed.
Blinking: Missed call(s) or Voice Mail received.
2.
Earphone
Delivers audio output.
3,5
Left and right softkeys
Correspond to functions displayed on the LCD. These functions
change depending on the current context.
4.
LCD display
Shows call information, handset status icons, prompt messages, etc.
6.
4 Arrow key combination
Permits navigation of the cursor through the displayed menu options.
7.
OK/Selection key
Selects the option chosen by the cursor. (Enters the main menu from
the home screen.)
8.
Off-hook / Dial key
Enters dialing mode, or dials number entered.
9.
On-hook / Power key
Terminates calls, or turns the handset on / off.
10.
Alphanumeric Keypad
Provides the digits, letters, and special characters in context-
sensitive applications. For + sign, press and hold key 0.
11.
Hands-free / Speaker key
Switches between handset and hands-free / speaker modes.
12.
Mute key
Activates or deactivates the mute feature.
13.
Microphone
Picks up audio earpiece and hands-free calls.
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DP720 Icons Description
The following table contains description of each icon that might be displayed on the screen of your DP720.
Table 8: DP720 Icons Description
Battery status
Not equipped with battery
Battery status
Battery empty
Battery status
Battery low
Battery status
Battery normal
Battery status
Battery full
Battery status
Charging
Signal status
Not subscribed
Signal status
Not in range
Signal status
Signal very low
Signal status
Signal low
Signal status
Signal normal
Signal status
Signal good
Signal status
Signal very good
Microphone MUTE Status
OFF - Not muted
ON – Muted
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Speaker status
OFF - Speaker is inactivated
ON - Speaker is activated
Headset icon
Missed Call icon
Voicemail icon
Ringtone status
OFF - Ringtone off (Silent mode)
ON - Ringtone on
Keypad Lock status
OFF - Keypad unlock
ON - Keypad locked
DND Status.
OFF - Do Not Disturb disabled
ON - Do Not Disturb enabled
Call forward
Call waiting
Information
Account not registered
Account Registered
Error message
Handset number
Incoming Call notification
Outgoing Call notification
Missed Call notification
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DP720 Handset Menu
The handset has an easy-to-use menu structure. Every menu opens a list of options. To open the main menu,
press “Menu” (left softkey) when the handset is on and in standby mode. Press Arrow keys to navigate to the
menu option you require. Then press “Select” (left softkey) or OK/Selection key to access further options or
confirm the setting displayed. To go to the previous menu item, press “Back” (right softkey). You can press
Power key at any time to cancel and return to standby mode. If you do not press any key, the handset
automatically reverts to standby mode after 20 seconds.
Voicemail notification
Contacts
Call History
Registration
Voice Mail
Preferences
Shortcut
Call features
Status
Settings
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Figure 8: DP720 Menu Structure
Contacts
Call History
Registration
Voice Mail
Preferences
Shortcut
Call Features
Status
Settings
1. Missed Calls
2. Accepted Calls
3. Outgoing Calls
4. All calls
1. Do Not Disturb
2. Call Forward
3. Call Waiting
4. Paging
1. Advisory Tone
2. Ringtones
3. Volume
1. Diagnostic Mode
2. Audio Loopback
3. LCD ON /OFF
4. LCD Diagnostic
5. System Monitoring
1. Change Base PIN
2. Factory Reset
3. Reboot Base
4. Repeater Mode
Private/Global Phonebook
LCD Timeout (Idle)
LCD Timeout (Call)
Menu Timeout
Message Waiting Prompt
LCD Brightness
1. Play Message
2. Set Voice Mail
3. Set Key 1
1. Register
2. Deregister
3. Select Base
Outgoing Default Line
Auto Answer
Off-Cradle Pickup
On-Cradle Hangup
Mute as DND
Disable Busy Tone
Disable CW Tone
Onhook Backlight
Cradle Backlight
SIP Account Display
PTT
Customizing keys functions
Speed dial
1. Base Status
2. Handset Status
3. Line Status
1. Handset Name
2. Phone Language
3. Date / Time
4. Audio
5. Display
6. Network Settings
7. SIP Settings
8. System Settings
9. Firmware Upgrade
10. Factory Functions
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Contacts
Display the contacts created on the handset DP720 and/or the ones imported via
XML or LDAP on DP750.
Call History
Display the call history:
1. Missed Calls.
2. Accepted Calls.
3. Outgoing Calls.
4. All Calls.
Note: You can add contacts to Shared Contacts directly from call logs.
Registration
• Register
Register your handset to base station.
• Deregister
Deregister your handset from base station.
• Select Base
• Select base station.
Voice Mail
1. Play Message
Play voice mail messages received.
2. Set Voice Mail
Configure voice mail parameters.
3. Set Key 1
Configure Key 1 as VM speed dial for selected account.
Preferences
• Outgoing Default Line
Select account to be use by default for outgoing calls.
• Auto Answer
Enable/Disable Auto Answer. (Default is Disabled).
• Off-Cradle Pickup
Enable/Disable Off-Cradle Pickup. If enabled, users can answer the calls by
picking up the handset off-cradle. (Default is Disabled).
• On-Cradle Hangup
Enable/Disable On-Cradle Hangup. If enabled, users can end the call by placing
the handset on-cradle. (Default is Disabled).
• Mute as DND
Enable/Disable Mute as DND. If enabled, pressing mute key on idle state will
set the phone to DND mode. (Default is Disabled)
• Disable Busy Tone
Enable/Disable Busy Tone. If set to enabled, busy tone will not be played.
(Default is Disabled).
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• Disable CW Tone
Enable/Disable CW Tone. If set to enabled, Call Waiting Tone will not be played.
(Default is Disabled).
• Onhook Backlight
Enable/Disable Onhook Backlight. If enabled, pressing key on idle screen
will switch off LCD screen. (Default is Disabled)
• Cradle Backlight
Enable/Disable/Dim Cradle Backlight. If enabled, LCD will remain backlit when
the handset is placed on-cradle/charging. If set to “Dim”, LCD brightness will be
reduced when the handset is placed on-cradle/charging. (Default is Disabled)
• SIP Account Display
Select which SIP Account information will be displayed on the screen.
▪ Name Only: Display SIP Account Name only. (Default)
▪ ID Only: Display SIP User ID only.
None: No account information will be displayed.
Shortcut
• Customizing keys functions
: Configure Left Softkey function in idle. Function can be set as Menu, History,
Contacts, Line or PTT. Default is Menu.
: Configure Right Softkey function. Function can be set as History, Contacts,
Line or PTT Default is Contacts.
: Configure Arrow UP Key function. Default is Outgoing Calls (Call History).
: Configure Arrow DOWN key function. Default is Accepted Calls (Call History).
: Configure Arrow LEFT key function. Default is Ringer Volume Down.
: Configure Arrow RIGHT key function. Default is Ringer Volume Up.
Select key and press OK button to configure function. Following functions are
available for arrow keys: 1. Disabled, 2. Menu, 3: Missed Calls, 4: Accepted Calls,
5: Outgoing Calls, 6: History, 7: Contacts, 8: Status, 9: Line, 10: Voice Mail, 11:
Ringer Volume Up, 12: Ringer Volume Down, 13: Audio Volume Up, 14: Audio
Volume Down.
• Speed Dial
Assign contact numbers as speed dial.
Select a key [2], [3], [4], [5], [6], [7], [8] or [9] and press OK button. Select “Edit”
to manually specify the destination number, or select “From Contacts” to select
a contact as speed dial destination.
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Call Features
1. Do Not Disturb
Enable/disable do not disturb mode on the phone.
2. Call Forward
Configure call forward feature.
3. Call Waiting
Configure call waiting feature.
4. Paging
Configures Inter-Handsets paging feature.
Note: Paging between handsets doesn’t require registered sip account.
Status
1. Base Status
Display Base status (Firmware, IP address, Subnet mask, Gateway, MAC
Address)
2. Handset Status
Display Handsets status (Model RF, Firmware, IPEI)
3. Line Status
Display Line status (Account name, Status)
Settings
1. Handset Name
Change the Handset name.
2. Phone Language
Select the language to be displayed on the phone's LCD. (Default is English.)
3. Date/Time
Configure date and time on the Handsets.
4. Audio
Specify ringtones for internal/external calls, the volume, advisory tones (Keypad,
Confirmation, Low battery notifications).
5. Display
Configure backlight, LCD timeout (Idle/Call), LCD brightness, Message Waiting
Prompt and menu key timeout.
6. Network Settings
Configure IP addresses and select DHCP/Static IP mode.
7. SIP Settings
Configure/View SIP accounts settings.
8. System Settings
Change Base PIN code, perform factory reset, reboot base and configure
repeater mode.
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9. Firmware Upgrade
Upgrade the firmware version of the Handsets.
10. Factory Functions
- Keypad Diagnostic
All LEDs will light up, and the LCD will display a table listing the names of all
keys in red. Press any key to diagnose; the key's name will display in blue. After
all keys are diagnosed, a prompt message (“PASS”) will display; press “Back”
(right softkey) to exit.
Note: User can long press arrow UP key to exit at any time.
- Audio Loopback
Speak to the phone using speaker/Handsets/headset. If you can hear your
voice, your audio is working fine. Press “Exit” softkey to exit audio loopback
mode.
- LCD ON / OFF
Select this option to turn off LCD. Press any button to turn on LCD.
- LCD Diagnostic
Select this option to enter LCD Diagnostic mode. Press “Next” (left softkey) to
display white screen. Continue pressing the left softkey to view all remaining
screens (black, blue, red, and green) and then exit. End the test early by
pressing the right softkey.
- LED Diagnostic
Enters this option and press “1” to start LED Diagnostic (you will notice that the
color of the LED will be changing). Press “2” to quit.
- System Monitoring
Displays RSSI, battery voltage and charging current and RPN information.
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BASIC OPERATIONS
Turning the Handset ON / OFF
To turn ON the handset
- Long press on Power key until the LCD screen lights up.
To turn OFF the handset
- Long press on Power key again when the handset is idle until the display turns off.
Setup Wizard
Setup wizard shows at first access to DP720 or factory reset allowing users to configure handset language
and date/time. Users can quit at any time by pressing "Skip" (left softkey).
Register DP720 Handset to DP750 Base Station
1. On DP750 Base station, press and hold the Radio/Page button for 7 seconds until the Radio icon
starts blinking to start Subscription process. Or Access web UI, and press Subscribe icon to
Open Subscription.
Figure 9: DECT Status - Subscribe
2. On DP720, press Subscribe softkey if available on the main screen or access Menu →Registration
→ Register while the DP750 Radio icon is blinking.
Note: “Subscribe” softkey appears only if DP720 is not registered to any DP750 base station.
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3. Select BaseX (X=1-4) corresponding to the desired base station DP750, then press Subscribe.
4. The DP720 will search for nearby base stations and will display the RFPI code and base station name
of the discovered DP750.
5. Press Subscribe to pair with the displayed DP750.
6. The DP720 will display Easy Pairing on the LCD and play an audible buzz when successful. Then it
will return to the home screen, displaying the handset name and number assigned by the registered
base station.
Figure 10: Registration process
Using DP720 with Multiple DP750 Base Stations
DP720 is able to be registered to up four different DP750 base stations.
Registering DP720 to an additional DP750 base station
Considering DP720 is previously registered to an initial base station, please follow below steps to register a
handset to an additional base station:
1. Press Menu (left softkey or the selection key) to bring up operation menu.
2. Use arrow keys to reach Registration and select Register.
3. Navigate to an unsubscribed base using arrow keys, and click on Subscribe.
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4. Make sure that the subscription is opened on the new base station.
Figure 11: Multiple Base Stations Registration
Switching Between Different Base Stations
1. Press “Menu” (left softkey or the selection key) to bring up operation menu.
2. Use arrow keys to reach Registration.
3. Navigate to Select Base using arrow keys.
4. Select the desired base station and press Select.
Figure 12: Switching Between Base Stations
Unregister the DP720
• Using DP720 Handset:
1. On DP720, press “Menu” (left softkey or the selection key ) to bring up operation menu.
2. Press arrow keys to move the cursor to Registration, then press “Select” (left softkey).
3. Navigate to Deregister.
4. Select the Handsets to be unregistered and press “Deregister” (left softkey).
5. Enter the system PIN code (default: 0000).
6. Press “Done” (left softkey) to confirm or “Back” (right softkey) to cancel.
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• Using DP750 Base Station UI:
1. Access DP750 Web Interface.
2. Go to Status → DECT Base Status.
3. Locate the handset to unregister and press “Unsubscribe” button.
Figure 13: Unregister DP720 from DP750 web UI
Obtain DP750 Base Station IP Address via paired DP720
DP750 is by default configured to obtain IP address from DHCP server where the unit is located. In order to
know which IP address is assigned to your DP750, please follow below steps using a paired DP720 handset
with your DP750 base station. Please see Register DP720 Handset to DP750 Base Station .
1. Press “Menu” (left softkey) or OK button on DP720 to view operation menu.
2. Press Arrow (Up, Down, Left, Right) keys to move the cursor to Status icon , then press
“Select” (left softkey) or OK button , then select Base Status.
3. Using Arrow keys, navigate down to view the IP address of the DP750.
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Key Lock
You can lock the keypad against unintentional entries. It is, however, still possible to pick up incoming calls
even with the keypad locked.
• To enable the Keypad Lock
1. Press the Pound key “#” and hold for approximately 2 seconds.
2. The display shows Keypad Locked briefly and the key lock icon appears in the display.
• To disable the Keypad Lock
1. Press and hold Pound key “#” to unlock the keys.
2. Keypad Unlocked appears briefly in the display and a windows prompt will be displayed to confirm
that the keypad is unlocked.
Locating a DP720 Handset from DP750 Base station
In some situations, you may have a DP720 handset incorrectly positioned and you don’t know its current
location. You can locate a DP720 handset from his registered DP750 base station using below steps:
Locate via DP750 Web UI
1. Access the Web GUI of your DP750 using the admin’s username and password. (Starting HW version
1.7A the default admin username is ‘admin’ while the admin password is the random password that
can be found on the sticker at the back of the unit. For lower hardware versions; the default username
and password are: admin/admin).
2. Press Login to access your settings and navigate to Status → DECT Base Status tab.
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3. Choose which handset to locate and press its corresponding Page button.
Note: If you press Page All icon , all registered DP720 handsets will be receiving paging call.
4. A paging call will be received on the selected DP720 handset.
5. Once located, you can press any key on the handset or press Page or Page All to end paging call.
Figure 14: Locate Handset via Web UI
Locate via DP750 Base station
1. On DP750 Base station back side, press Radio/Page button .
2. All registered handsets will receive Paging call.
3. Once located, you can end the paging calling by pressing any key on the handsets or by pressing
again Radio/Page button.
Checking System Status
You can view the system status on your handset including the following information of the system:
Table 9: DP720 Info description
Item
Description
Model (RF)
Displays the product model, hardware version and DECT region of DP720.
i.e.: DP720 1.4A (EU)
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Firmware
Current firmware version installed on DP720.
IP Address
IP address of the base station DP750 if registered.
Subnet Mask
Subnet Mask of the base station DP750 if registered.
Gateway
Gateway IP of the base station DP750 if registered.
MAC address
MAC address of the base station DP750 if registered.
IPEI
International Portable Equipment Identifier.
Unique “serial number” for DECT handsets.
• To check the handset status
1. Press Menu (left softkey or the selection key ) to bring up operation menu.
2. Use arrow keys to reach Status menu , then select Handset Status.
Basic Network Settings
Once connected to the network, DP750 base station will attempt to contact a DHCP server to obtain valid
network settings (e.g., IP address, subnet mask, gateway address and DNS address) by default.
The users could also configure basic network settings manually from a registered DP720 Handset. In order
to configure the network settings manually, please follow the steps below:
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Settings and access Network Settings menu.
3. Enter the system PIN code (default: 0000) and press the softkey “Done”.
4. To change to static IP, press or to select Static from the IP Settings field.
5. Enter valid values in the IP Address, Subnet Mask, Gateway, DNS Server fields.
6. Press softkey “Save” to save and apply the new changes.
Note: A prompt message will be displayed to confirm that the new settings are saved successfully
7. The DP70 will display a reboot confirmation message, select “Yes” to apply the new settings or “No”
to avoid rebooting the DP750.
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Figure 15: Network Settings configuration
Change Menu and LCD Timeout
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to Display, and then press “Select” (left softkey).
4. Set desired time in seconds for Backlight timeout and for Menu timeout. Available value: 15
seconds, 30 seconds, 60 seconds or disabled. (Default is 30 seconds)
5. Press Save (left softkey) to save and apply the new settings.
Return to Idle Screen
Press the Power Key to quickly exit the menu and return back to the main idle screen.
If you do not press any key in a period of time, the LCD screen will automatically exit the menu and return to
the idle screen as well.
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When you are navigating on the handset’s menu, and you receive an incoming call, the LCD screen will
automatically exit the menu and you can either accept or reject the call. When the call is terminated, the LCD
screen will return back to the idle screen.
Register a SIP Account
DP750 supports up to 10 SIP accounts, 5 handsets. Each handset can be configured up to 10 accounts.
Please be aware that line settings will be affected by DID settings (hunting group settings) in “DECT → SIP
Account Settings”. For more details about “Hunting Group”, please refer to “Administration Guide”.
Register Account via Web User Interface
1. Access your DP750 base station web UI by entering its IP address in your favorite browser.
2. Enter your admin’s username and password (Starting HW version 1.7A the default admin username
is ‘admin’ while the admin password is the random password that can be found on the sticker at the
back of the unit. For lower hardware versions; the default username and password are: admin/admin).
3. Press Login to access your settings.
4. Go to Profiles tab and select a profile to use.
DP750 supports up to 4 profiles. A profile is a set of settings including general settings, network settings,
SIP setting, audio setting, call settings and ring tones, etc.
A profile can be used with different SIP accounts.
5. In General Settings, set the following:
a. Profile Active to Yes.
b. SIP Server field with your SIP server IP address or FQDN.
c. Failover SIP Server with your failover SIP server IP address or FQDN. Leave empty if not
available.
d. Prefer Primary SIP Server to No or Yes depending on your configuration. Set to No if no
failover SIP server is defined. If “Yes”, account will register to primary SIP server when
failover registration expires.
e. Outbound Proxy with your outbound proxy IP address or FQDN. Leave empty if not
available.
f. Voice Mail Access Number Allows users to access voice messages. This value is usually
the VM portal access number. For example: configuring the access code to “*97,,password”
will automatically dial the Voice Mail box and enter the password.
6. Press Save and Apply to save your configuration.
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7. Go to DECT → SIP Account Settings
Figure 16: SIP Settings
8. Configure your SIP details in desired account:
a. Account: Select Account row to configure (Account 1 – Account 10).
b. SIP User ID: User account information, provided by VoIP service provider (ITSP). Usually
in the form of digit similar to phone number or actually a phone number.
c. Authenticate ID: SIP service subscriber’s authenticate ID used for authentication. Can be
identical to or different from SIP User ID.
d. Password: SIP service subscriber’s account password to register to SIP server of ITSP.
For security reasons, the password will field will be shown as empty.
e. Name: Any name to identify this specific user.
f. Profile: Select the corresponding Profile ID (1/2/3/4).
g. HS Mode: Assign the account to specific handset (HS1, HS2…) or hunting group mode.
h. Active: Set to Yes. If set to No, account is disabled and will not register.
9. Press Save and Apply to save your configuration.
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Figure 17: SIP Accounts Settings
After applying your configuration, your phone will register to your SIP Server.
You can verify if your DECT phone has registered with your SIP server from your DP750 web interface under
Status → Account Status (a green background with Yes under SIP Registration column for corresponding
account indicates the account has been successfully registered).
Figure 18: Account Status
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PHONE SETTINGS
This chapter will help you with the instruction for configuring and changing the settings of your DP720,
Editing the Handset’s name
The procedure to change the handset’s name is as follows:
• Using DP720 Handset:
• Press Menu to bring up operation menu.
• Use arrow keys to reach Settings .
• Navigate to select Handsets Name, and then press “Select”.
• Enter the desired name and press “Rename” and then the DP720 will display a confirmation message
that the rename operation was successful.
Figure 19: Handset Name editing
• Using DP750 Base Station UI:
1. Access DP750 Web Interface.
2. Go to DECT → General Settings.
3. In “Handset Settings” section, change Handset Name to desired name.
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Figure 20: Edit Handset Name from DP750
Changing the Base PIN Code
Users can change their code PIN by following the steps below:
• Using DP720 Handset:
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select System Settings, and then press “Select”.
4. Enter the current code PIN (By Default is 0000), a new window will be displayed inviting you to enter
the new password, when done press “Save” (left softkey) and a prompt message will be displayed to
confirm that the new code PIN has been saved successfully.
Figure 21: Changing Admin Base PIN Code from DP720
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• Using DP750 Base Station UI:
1. Access DP750 Web interface.
2. Go to DECT → General Settings.
3. Set new PIN code in Admin PIN Code field.
Note: Only digits accepted. Minimum allowed length is 4 digits.
Figure 22: Changing Admin Base PIN Code from DP750
Selecting Phone Language
The DP720 supports displaying texts in different languages. The handset supports 20 languages (see the
table of the technical specifications). The default language of the handsets is English. You can change the
language according to your requirement. To change the language of the handsets, please proceed as follows:
1. Press Menu (left softkey or the selection key) to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select Phone language, then select the desired language and press “Select” (Left
softkey). The LCD screen prompts “Change phone language to xxx (xxx it’ the language you selected)”
4. Press “Yes” (left softkey) to accept the change. Text displayed on the handsets will change to the
selected language.
Figure 23: Handset Language
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Activate/Deactivate Hands-Free Mode
This function allows you to make a call without having to hold the handsets in your hand.
1. Press the Hands-free key while you are making a call or on the idle screen to activate hands free
mode.
2. Press the Hands-free key again to deactivate the hands-free function.
Muting the Microphone
Press the Mute key to switch off the microphone during an established call. You can now talk freely
without the other party hearing you and the icon of mute will be displayed on the screen. Press the Mute
key again to switch the microphone back on.
Adjusting Speaker and Earpiece Volume
Press left key or right key while you are on an established call to set the volume of the earphone /
speaker. You can choose between 5 different levels. The default level is 3:
Volume 0 (Silent Mode) Volume 3
Volume 1 Volume 4
Volume 2 Volume 5
Ringtones
Setting the Ringer Volume on the Handset
You can adjust the ringer volume for an incoming call to one of 6 levels (level 1 to 5 and off). Level 5 is the
highest level. (The DP720 Handset is set to level 3 by default).
In order to configure the desired ringer volume, proceed as follows:
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select Audio → Volume.
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4. Press the left and right arrow keys to change repeatedly and set the desired volume.
5. Press “Save” to confirm the volume, and a message prompt will be displayed to confirm that the new
volume has been successfully saved.
If you select OFF, the icon appears in the display and the handset will not ring for incoming calls.
Figure 24: Ringer Volume
Setting the Ringer Melody on the Handset
You can change the ringer melody for an incoming call. The device has 8 different ringer melodies for you to
choose from (1-8). The default setting for the ring tone for a call is melody 1.
In order to configure the desired melody, proceed as follows:
1. Press Menu (left softkey or the selection key) to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select Audio → Ringtones.
4. Press “Select” (left softkey) to confirm the ringtones selected and a message prompt will be displayed
to confirm that the new ringtones has been set successfully.
Figure 25: Calls Ringtones
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Advisory Tones
Advisory tones are acoustic signals, which inform you of different actions and states on your handset. The
following advisory tones can be configured independently of each other:
▪ Keypad tone: it’s played when a user presses any key of the keypad (even during calls).
▪ Confirmation: it’s played when a user saves settings or places the handset in the charger cradle.
▪ Low battery: it’s played if the capacity of the batteries is low or the handset requires charging.
To configure the advisory tones
1. Press Menu (left softkey or the selection key) to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select Audio → Advisory tones and choose which tone you want to change it.
4. Press the left and right arrow keys to either enable or disable the desired tones.
5. Press “Save” (left softkey) to confirm, and a message prompt will be displayed to confirm that the
new settings has been successfully saved.
Figure 26: Advisory Tone
Ringtones Customization
DP750/720 allow users to use custom ringtones. Custom ringtones will be stored on DP750 base station and
only selected custom ringtone will be downloaded to specific DP720 handset.
DP750 base station supports up to 10 custom ringtones.
Custom ringtone should be generated using GS Ringtone Tool and named ring[1-10].bin (example: ring1.bin ,
ring6.bin).
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To use custom ringtones, follow below steps:
Step 1: Generate Custom Ringtone(s)
1. Download “Ringtone Generator” tool available at http://www.grandstream.com/support/tools
2. Run the tool and select your ringtone file to convert.
Figure 27: Generating Custom Ringtone (Windows)
Notes:
Currently only 16-bit linear PCM audio is supported for .wav files. The sampling rate should be
automatically detected and the audio will automatically be down sampled to 8kHz. Stereo channels
are also detected and mixed to produce mono output.
.pcm files should be pre-formatted to 16-bit 8kHz mono format.
3. Press “Generate Ringfile” to finish the process. Ringtone with filename “ring1.bin” will be created at
same location as ringtone tool.
Step 2: Download Custom Ringtone(s) to DP750 Base Station
1. Make generated ringtone files available in your TFTP, HTTP or HTTPS server.
2. Access DP750 Web GUI and go Maintenance → Firmware Upgrade page.
3. Set “Upgrade Via” to TFTP, HTTP or HTTPS (depending on server type hosting ringtone files).
4. Set “Firmware Server Path” to IP address or the FQDN of the server.
5. Set “Firmware Upgrade and Provisioning” to “Always Check for New Firmware”.
6. Update the change by clicking the "Save and Apply" button. Then "Reboot" or power cycle the base
station to download the ringtone(s).
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Figure 28: Downloading Custom Ringtones
Step 3: Assigning a Custom Ringtone for a DP720 Handset
1. Access DP750 Web GUI and go DECT → HS Settings → HS# Settings page.
2. In Custom Ringtone, select a custom ringtone from the dropdown list.
Note: If the list is not showing downloaded custom ringtone(s), press and check again.
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Figure 29: Custom Ringtone on DP750
3. Press “Save and Apply”. DP720 handset will download the ringtone locally before using it. (DP720
LCD screen will display download progress at this stage).
4. On DP720 Handset menu, access Settings → Audio → Ringtones. Select Custom Ringtone using
up/down arrow keys and press “Select” softkey.
Note: DP720 handset can use one custom ringtone only.
Date and Time
On the DP720 the Date and time are displayed on the idle screen and it obtains the date and time from the
Simple Network Time Protocol (SNTP) server by default. If your handset cannot obtain the date and time from
the SNTP server, you need to configure the date and time manually. You can configure the time format and
date format respectively. The handset supports two formats for time (12 Hour or 24 Hour) and three date
formats (DD/MM/YYYY; MM/DD/YYYY; YYYY/MM/DD).
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To configure date and time manually
1. Press Menu (left softkey or the selection key ) to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to Date and time. Edit the current values in the Date & Time fields (you can change the
date / time format using the left key or right key and press “Set” (left softkey ).
4. Press “Save” softkey to apply your changes.
Figure 30: Date and Time Settings
Outgoing Default Line
When a Handsets is configured with more than one line, users can change the default outgoing line on DP720
handset using keypad Menu → Preferences → Outgoing Default Line.
Factory Functions
The factory functions include the following diagnostic options:
• Keypad Diagnostic
• Audio loopback
• LCD on / off
• LCD diagnostic
• System Monitoring
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1. Press Menu (left softkey or the selection key) to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select Factory Functions and choose which diagnostic, you need to perform:
- Keypad Diagnostic
All LEDs will light up. All keys’ name will display in red on LCD screen before diagnosing. Press any
key on the keypad to diagnose the key’s function. When done, the key’s name will display in blue
on LCD with a prompt message (PASS). To exit press “Back” (right softkey).
Note: Long arrow UP key at any time to exit diagnostic mode.
- Audio loopback
Speak to the phone using speaker/handsets/headset. If you can hear your voice, your audio is
working fine. Press “Back” (left softkey) to exit audio loopback mode.
- LCD ON / OFF
Selects this option to turn off LCD. Press any button to turn on LCD.
- LCD Diagnostic
Enters this option and press Left/Right arrow key to do LCD Diagnostic (you will notice that the color
of the LCD will be changing). Press right softkey to quit.
- LED Diagnostic
Enters this option and press “1” to start LED Diagnostic (you will notice that the color of the LED will
be changing). Press “2” to quit.
- System Monitoring
Displays RSSI, battery voltage and charging current and RPN information.
Figure 31: Factory Functions
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DP720 Handset Firmware Upgrade
The DP720 handset can detect if a new firmware is available when it is registered to a base station.
Figure 32: New Firmware Available Notification
To upgrade the firmware on your handsets, follow the steps below:
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select Firmware Upgrade and press the softkey “Select”.
4. The LCD screen will display a prompt message to confirm the firmware downloading / upgrading
press the right softkey “Back” to dismiss the upgrade process.
Figure 33: Firmware Upgrade
Reboot DP750 Base Station
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select Settings → System Settings and choose Reboot Base.
4. Enter Base PIN code (by default the PIN code is: 0000).
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5. The LCD screen will display a prompt message to confirm rebooting the base station, press “Yes”
(left softkey) to confirm or press “No” (right softkey) to cancel.
Figure 34: Rebooting the Base Station
Reset DP720 Handset
The users can reset the new settings made on the handsets after performing factory reset. To reset your
handsets to the default settings:
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Settings .
3. Navigate to select Settings → System Settings and choose Factory Reset.
4. The LCD screen will display a prompt message to confirm restoring factory settings, press “Yes” (left
softkey) to confirm and then the handsets will reboot to apply the default settings or press “No” (right
softkey) to cancel.
Figure 35: Resetting the Base Station
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CALL OPERATIONS
This chapter will guide you to place calls, transferring and holding the incoming calls.
Placing calls
To place calls, you can use the following mode:
• Earpiece mode: pressing the off-hook key to dial out.
• Speakerphone mode: pressing the speakerphone key to dial out.
• Headset mode: pressing the off-hook key to dial out using connected headset.
During the call, you can switch the call mode by pressing the corresponding keys or connecting a headset.
Make a Call using a Line
Making calls require the use of SIP lines. So, you should first register the SIP account to the handset
beforehand, after registering the sip lines, you can assign one or more outgoing lines for the handset. The
handset can only use the assigned outgoing line(s) to place calls.
Please refer to the following methods to make calls using a line:
Method 1:
▪ Via default outgoing line:
1. Enter the desired number using the keypad.
2. Press Dial key or Speaker key . The handset will use the default outgoing line to dial
out.
3. To terminate the call, press Hang-Up key .
Note: To change the default outgoing line, please refer to Outgoing Default line.
▪ Selecting the outgoing line:
1. Enter the desired number using the keypad.
2. Press the left softkey “Call”.
3. Select the desired line to dial out.
4. To terminate the call, press Hang-Up key .
Method 2:
1. Press Dial key or Speaker key to enter the pre- dialing screen.
2. Enter the number to dial using the keypad.
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3. Press Dial key , # (Use # as dial key” must be configured in web configuration) or wait for
4 seconds and the call will be initiated automatically.
4. To terminate the call, press Hang-Up key .
During the call, you can switch the call mode by pressing the corresponding keys and cancel the dialing
operation by pressing the on-hook key. During the call conversations, you can press the left and right
navigation keys to adjust the volume. The call duration is displayed on the LCD screen while the call is in
progress and call summary will be displayed once the call is terminated.
Notes:
- To dial “+” please keep pressing “0” key for about 2 seconds.
- To dial from contacts list, choose a contact using navigation keys and press Dial key .
Dialing from Call history
Users may use their call history entries to initiate calls.
1. Press Menu (left softkey or the selection key ) to bring up operation menu.
2. Use arrow keys to reach Call History Icon and then press “Select” (left softkey ).
3. Select the desired entry, then press Dial key to establish the call.
Note: In step 3, users can press “Options” softkey followed by “Edit Dial” option to initiate the call.
The call history list stores the last dialed phone numbers. When the memory of the redial number list is full,
the handset will automatically erase the oldest dialed number when a new number is dialed
Dialing from Phonebook
Users may use their private or shared contacts to initiate calls.
1. Press Contacts (right softkey ) to access phonebook menu.
2. Select Private or Shared phonebook.
3. Select the contact to call.
4. Press Dial Key to initiate the call.
Note: In step 3, users can press “Options” softkey followed by “Edit Dial” option to initiate the call.
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Intercommunication
Users may make phone calls between different handsets directly without remembering each user’s phone
number.
1. Go to Handset GUI -> Shortcut
2. Configure a navigation key (up, down, left or right key) to “Intercom”.
3. Press the key just configured at the idle state.
4. Choose the handset name that you want to call.
.
Figure 36: Shortcut Setting
Answering Calls
When receiving an incoming call, you can answer the call using following steps:
• Earpiece mode:
Press Dial Key to pick up the call, or “Accept” softkey (left softkey ).
• Speakerphone mode:
Press Speaker Key to pick up the call.
• Headset mode:
Press Dial Key to pick up the call, or “Accept” softkey (left softkey ) using a connected
headset.
Note:
- To answer an incoming call during an established call, press Dial Key , or the Speaker Key
, or the “Answer” softkey. The incoming call is answered, and the original call is placed on hold.
- You can switch off the ringer temporarily by pressing Silent softkey.
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Auto Answer
Users can enable Auto Answer feature to accept and automatically answer incoming calls.
If enabled, DP720 Handset will automatically answer incoming calls using speaker mode.
To activate / deactivate the auto answer feature:
• Using DP720 Handset Menu
1. Press Menu to bring up operation menu.
2. Select Preferences → navigate to Auto Answer using the up/down arrow keys.
3. Switch between Enabled/Disabled using left/right arrow keys and “Save” after Enabling / Disabling
the option.
• Using DP750 Base Station Web Interface
1. Access DP750 Base Station Web Interface.
2. Go to DECT → Handset Settings → HS# Settings.
3. Set “Enable Auto Answer” to “Yes”. (By default, set to “No”).
Off-Cradle Pickup
Users can enable Off-Cradle Pickup feature to automatically answer incoming calls after picking up DP720
Handset from its cradle. Incoming calls will be automatically answered using earpiece mode.
Notes:
▪ DP720 Handset should be resting on its cradling and then picked up for this feature to work.
▪ “Auto Answer” feature should be set to “No” to work properly.
To activate / deactivate the off-cradle pickup:
• Using DP720 Handset Menu
1. Press Menu to bring up operation menu.
2. Select Preferences → navigate to Off-Cradle Pickup using the up/down arrow keys.
3. Switch between Enabled/Disabled using left/right arrow keys and “Save” after Enabling / Disabling
the option.
• Using DP750 Base Station Web Interface
1. Access DP750 Base Station Web Interface.
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2. Go to DECT → Handset Settings → HS# Settings.
3. Set “Enable Onhook on Cradle Reposition” to “Yes”. (By default, set to “No”).
Ending Calls
To terminate the calls, press Hang-Up key .
On-Cradle Hang-up
Users can enable On-Cradle Hang-up feature to automatically end ongoing calls after placing DP720 Handset
on its cradle.
To activate / deactivate the on-cradle hang-up feature:
• Using DP720 Handset Menu
1. Press Menu to bring up operation menu.
2. Select Preferences → navigate to On-Cradle Hang-up using the up/down arrow keys.
3. Switch between Enabled/Disabled using left/right arrow keys and “Save” after Enabling / Disabling
the option.
• Using DP750 Base Station Web Interface
1. Access DP750 Base Station Web Interface.
2. Go to DECT → Handset Settings → HS# Settings.
3. Set “Enable Off hook on Cradle Pickup” to “Yes”. (By default, set to “No”).
Rejecting Calls
To reject an incoming call, press Hang-Up key or “Reject” softkey (right softkey )
Direct IP Call
Direct IP calling allows two parties, that is, a handset and another VoIP device, to talk to each other in an ad
hoc fashion without a SIP proxy.
Elements necessary to complete a Direct IP Call:
• Both DP720 and other VoIP Device, have public IP addresses, or
• Both DP720 and other VoIP Device are on the same LAN using private IP addresses, or
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• Both DP720 and other VoIP Device can be connected through a router using public or private IP
addresses (with necessary port forwarding or DMZ).
Users can perform IP calls using Star code following the below steps:
1. Pick up the handset and press Dial key .
2. Dial *47 followed by the target IP Address.
Note: You can enter directly *47 + target IP address, and then press the dial key to initiate the call.
Examples of direct IP calls
a) If the target IP address is 192.168.0.160, the dialing convention is *47 then 192*168*0*160, followed
by pressing the “#” key if it is configured as a send key or wait 4 seconds. In this case, the default
destination port 5060 is used if no port is specified.
b) If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be:
*47 or Voice Prompt with option 47, then 192*168*0*160*5062 followed by pressing the “#” key if
it is configured as a send key or wait for 4 seconds.
Note: To accept incoming direct IP call, Use Random Port setting should be set to NO. If set to YES, it
can only dial out. The setting is available on DP750 web interface → Profile → SIP Settings → Basic
Settings.
Call Hold/Resume
During an established call, you can put the call on hold and resume following below steps:
1. Press the left softkey to access the call Options and then navigate to Hold.
2. Press “Select”, left softkey to put the call on hold.
3. To resume the call, access the options menu again and navigate to Resume, then press Select.
Call Waiting
This feature will notify you of a new incoming call during an established call, and display the incoming call
information visually on the LCD screen and a call waiting tone will be heard. If this feature is disabled, the
new incoming call will be automatically rejected.
There are 2 ways to activate call waiting feature either using DP720 Handset Menu or using DP750 Base
Station Web Interface.
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• Using DP720 Handset Menu
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Call Features → navigate to Call waiting sub-menu.
3. Select the account for which you want to enable the Call waiting feature, and then press left softkey
“Select”.
4. Choose between Enabled and Disabled options and press the softkey “Save”, a prompt message
will be displayed to confirm that the call waiting is enabled / disabled.
5. During an established call, press (dial key) to put first call on hold and answers second incoming
call. If no second incoming call, pressing will give the ability to initiate another call while first one
is on hold.
Note: You can switch between active/on-hold calls by pressing Options → Swap.
• Using DP750 Base Station Web Interface
1. Access DP750 Base Station Web Interface.
2. Go to DECT → Handset Settings → HS# Settings.
3. Set “Disable Call Waiting Tone” to “No”. (Default is No).
4. Press “Save and Apply” button to confirm.
Do Not Disturb
You can activate or deactivate the DND mode for your accounts registered on the handset under the call
settings. If DND mode is activated for a specific line, all incoming calls will receive busy treatment depending
on your configuration (forward to voice mail, busy tone…)
To enable or disable the DND mode, follow the next steps
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Call Features → navigate to Do Not Disturb sub-menu.
3. Select the account on which you want to enable / disable the DND mode and then press “Select”
4. Choose between Enabled and Disabled options and press softkey “Save” to accept the changes, a
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prompt message will be displayed to confirm that the DND is enabled / disabled.
You can navigate to Status → Line status to check if the DND mode is enabled on the base station.
Call Forward
The call forward feature will allow you to forward all the incoming calls to the desired number. Three possible
call forward types are available on the DP720.
▪ Forward all: All the incoming calls are immediately forwarded.
▪ Busy Forward: Incoming calls are immediately forwarded if the line is busy.
▪ No Answer Forward: Incoming calls are forwarded if not answered after a period of time.
To enable the call forward, please refer to the following steps:
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Call Features → navigate to Call Forward sub-menu.
3. Select the account on which you want to enable/disable the call forward feature and press “Select”.
4. Select the type of call forwarding and enter the number to forward the calls, and then press “Save”
(left softkey) to apply the settings, a prompt message will be displayed to confirm that the new settings
have been saved successfully.
Paging
The DP720 supports paging other handsets internally without having any sip Account registered. Similarly, to
the base station paging button, Inter-Handsets paging features enables handsets to ring other handsets. The
feature can be enabled from LCD menu → Call Features → paging.
Call Transfer
The DP720 supports the call transfer feature, you can transfer a call to another party using one of the following
ways:
▪ Blind transfer: Transfer a call directly to another party without consulting
▪ Attended transfer: Transfer a call with prior consulting.
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Blind Transfer
1. Press the “Options” softkey (Left softkey ) during a call, and then select Blind Transfer.
2. The initial call will be put on hold; enter the number you want to transfer the call to.
3. Press on Transfer softkey and the call will be transferred to the number or the handset specified.
Attended Transfer
1. Press Left softkey “Options” during a call, and then select Attended Transfer.
2. Choose the line and enter the number you want to transfer the call to, then press Dial key or Call
softkey.
3. Once the second call is established, press Transfer softkey to Transfer the call.
Transfer between handsets
The Call Transfers can also be done between handsets without SIP account. The DP75x can transfer a call
to another handset even if it has no SIP account registered.
Speed Dial
Speed dial allows users to perform single-digit dialing to predefined numbers. This feature is particularly
useful to speed up dialing frequently used or hard to remember numbers. A maximum of 8 speed dial numbers
is allowed. Allowed
For example, the digit key 2 is configured as a speed dial key and assigned the number 2000, the phone will
dial out the number 2000 directly when you long press digit key 2.
❑ To assign the frequently used numbers as speed dial keys:
1. Press Menu to bring up operation menu.
2. Access to Shortcut and then use Arrow keys to reach Speed Dial sub-menu.
Or;
Long press the representative number from 2 to 9 to set. (Note: The Speed dial number should not
be already set on chosen representative number, otherwise long press will initiate a call to configured
speed dial number).
3. Choose the digit key (2-9) to set and press Options or OK button. Three options will be available:
• Edit: To configure manually a contact as speed dial. Users need to enter “First Name”, “Last
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Name” and “Number”. (Note: First Name + Number or Last Name + Number are accepted).
• From Contacts: To set a contact from the phonebook directory to be as speed dial.
❑ To Modify a Speed Dial:
Repeat above 2 steps.
At step 2, re-edit /re-assign a contact from the shared or private directory as speed dial on selected key.
❑ To Delete a Speed Dial:
Repeat above 2 steps.
At step 2, select Clear Entry option and press OK or Select to confirm.
3-Way Conference
The DP720 supports creating a local conference with other parties (including handset starting the conference).
To start a 3 Way conference, follow below steps:
1. Press the Dial key to place a call to the first party.
2. Press left softkey “Options” , then select Conference
3. Enter the number of the second party you want to add to the conference and press Dial Key .
To drop the conference call, press or “End” softkey.
Note: Conference can be bridged before third party answers.
Voice Mail
The voice mail feature ensures that you will never miss any important messages. It permits either to leave
voice mails to someone else or receive and listen to voice mails via the handset
Set Voice Mail Feature Code
There are 2 ways to set Voice Mail Feature Code, either using DP720 Handset Menu or using DP750 Base
Station Web Interface.
Note: The Voice Mail Feature Code depends on the service provider or IP-PBX used. For example, if
UCM6xxx as SIP server, the Voice Mail Feature Code is *97.
• Using DP720 Handset Menu
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1. Press Menu (left softkey or the selection key) to bring up operation menu.
2. Access to Voice Mail and then select Set Voice Mail sub menu.
3. Select the account and enter the “VM Access Number”, then press “Save” softkey.
• Using DP750 Base Station Web Interface
1. Access DP750 Base Station Web Interface.
2. Go to Profiles → Profile X → General Settings.
3. Configure Voice Mail Access Number.
Play Voice Mail Messages
1. Press “Menu” to bring up operation menu.
2. Access to Voice Mail and then select Play Message sub menu.
3. Select the account to retrieve your voice messages saved on your voice mail.
Or;
Long press digit “1” key to dial configured Voice Mail feature code using Default Line.
Notes:
• Users can access directly voicemail menu to play messages, by clicking on “View” (left softkey )
when the notification of a new voicemail pops up on the DP720’s LCD screen.
• If VM is protected by a password, users can enter the password using DP720 keypad after reaching
Voice Mail system. The password is defined on the service provider or IP-PBX side.
PTT (Push-To -Talk)
The DP720 support the Push to talk (PTT) features which is a technology based on the instantaneous
communication commonly employed in wireless cellular phone services using a button to switch the device
from voice transmission mode to voice reception mode. This feature is similar to "walkie talkie" use and the
PTT mode switches a phone from full duplex mode, where both parties can hear each other simultaneously,
to half duplex mode, where only one party can speak at one time. Multiple parties to the conversation may
also be included.
Configuration:
PTT feature is always enabled on the base station, to use the PTT feature, users need to enable the PTT on
handset at: Handset Menu →Preferences → PTT → set “Enabled”. Also, to use PTT, the handset needs a
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dedicated a soft key to push and then to talk, user can choose to use either LSK (Left Softkey) or RSK (Right
Softkey) in Shortcuts settings. (If you forgot to enable the PTT, when you press the PTT softkey, it will redirect
you to the setting to enable it before you can use it.)
Figure 37: Enabling PTT and assigning a softkey to it
Users can configure “DECT PTT Silence Timer” on the Web UI at → DECT → General Settings. When a PTT
call established, any handset who enabled PTT feature will automatically join the PTT call. if there is no one
talking, after certain time, the PTT call will be closed. This timeout setting is to determine how long the PTT
call will be closed after being idle status. If set to 0, the timer will be disabled, and the PTT will be remaining
forever until all party exit the PTT call.
Functionality:
1. Users could press and hold the configured softkey (LSK or RSK) from any screen to quickly initiate
PTT call.
Figure 38: PTT Call Establishment
2. Available handsets (subscribed to the same base station) will receive the PTT call.
3. Keep holding PTT key while speaking.
The channel status will change to Sending PTT to indicate that you are transmitting as displayed on
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the following screenshot.
Figure 39: PTT Transmission
To terminate PTT call, press button.
Note: User should expect a delay of 6-8 seconds to establish PTT call due to DECT signaling, and which will
not exist once PTT call is established.
Call Features
The DP750/DP720 supports traditional and advanced telephony features including caller ID, caller ID with
caller Name, call forward etc.
Table 10: Call Features
*30
Block Caller ID (for all subsequent calls)
• Off hook the phone;
• Dial *30.
*31
Send Caller ID (for all subsequent calls)
• Off hook the phone;
• Dial *31.
*67
Call with Caller ID Blocked (per call)
• Off hook the phone;
• Dial *67 and then enter the number to dial out.
*82
Call with Caller ID Enabled (per call)
• Off hook the phone;
• Dial *82 and then enter the number to dial out.
*72
Unconditional Call Forward. To set up unconditional call forward:
• Off hook the phone;
• Dial *72 and then enter the number to forward the call;
• Press OK softkey or SEND key.
*73
Cancel Unconditional Call Forward. To cancel the unconditional call forward:
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• Off hook the phone;
• Dial *73;
• Hang up the call.
*90
Busy Call Forward. To set up busy call forward:
• Off hook the phone;
• Dial *90 and then enter the number to forward the call;
• Press OK softkey or SEND key.
*91
Cancel Busy Call Forward. To cancel the busy call forward:
• Off hook the phone;
• Dial *91;
• Hang up the call.
*92
Delayed Call Forward. To set up delayed call forward:
• Off hook the phone;
• Dial *92 and then enter the number to forward the call;
• Press OK softkey or SEND key.
*93
Cancel Delayed Call Forward. To cancel the delayed call forward:
• Off hook the phone;
• Dial *93;
• Hang up the call.
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RESTORE FACTORY DEFAULT SETTINGS
Warning:
Restoring the factory default settings will delete all configuration information on the phone. Please backup or
print all the settings before you restore to the factory default settings. Grandstream is not responsible for
restoring lost parameters and cannot connect your device to your VoIP service provider.
Please follow the instructions below to reset the phone:
1. Press MENU button to bring up the keypad configuration menu;
2. Select Settings and enter;
3. Select System Settings → Factory Reset;
4. A warning window will pop out to make sure a reset is requested and confirmed;
5. Press Yes softkey to confirm and the phone will reboot.
6. To cancel the Reset, press No softkey instead.
Users also can perform factory reset using combo keys on DP720 during booting up prior it’s fully booted, to
give DP720 the ability to recover from some extreme cases like self-reboot or stuck right after booted up.
Please refer to following procedure for DP720 factory reset using combo key:
1. Connect the USB cable and power off DP720.
2. Power on DP720 and wait for Green LED.
3. Press 3 times Central Key (OK/Selection Key) quickly after Green LED on.
4. Press Speaker Key (left bottom) first and then Mute Key (right bottom) after Red LED on.
5. DP720 LED will start blinking in 3 colors: Green, Red and Orange if factory reset successful triggered.
6. Wait for about 1-3 minutes, the DP720 will boot up with setup wizard for initial language and date
format settings.
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EXPERIENCING DP750/DP720
Please visit our website: http://www.grandstream.com to receive the most up- to-date updates on firmware
releases, additional features, FAQs, documentation and news on new products.
We encourage you to browse our product related documentation, FAQs and User and Developer Forum for
answers to your general questions. If you have purchased our products through a Grandstream Certified
Partner or Reseller, please contact them directly for immediate support.
Our technical support staff is trained and ready to answer all your questions. Contact a technical support
member or submit a trouble ticket online to receive in-depth support.
Thank you again for purchasing the Grandstream DP720 / DP750, it will be sure to bring convenience and
color to both your business and personal life.
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