AudioCodes 445HD, 450HD, C450HD User Manual

Release Notes

AudioCodes High Definition IP Phones Series

445HD, 450HD, C450HD IP Phones RX50 Conference Phone Huddle Room Solution (HRS)

Version 3.4.4

Release Notes Contents

1 Introduction .......................................................................................................................... 7

1.1 Overview .................................................................................................................................. 7

1.1.1 About the RX50 Conference Phone ...........................................................................................7

1.1.2 Differentiating RX50 from AudioCodes’ Other Phone Models .....................................................7

1.1.3 About AudioCodes’ 400HD Series of Teams-Compatible IP Phones ..........................................8

1.2 400HD Series IP Phones Specifications ................................................................................... 8

1.3 Supported Models .................................................................................................................. 16

2 Version 3.4.4....................................................................................................................... 19

2.1.1 What’s New in Version 3.4.4 .................................................................................................... 19

2.1.2 Known Constraints in Version 3.4.4 ......................................................................................... 20

2.1.3 Resolved Constraints in Version 3.4.4 ..................................................................................... 24

3 Previous Releases ............................................................................................................. 25

3.1 Version 3.4.4.1000.10............................................................................................................. 25

3.1.1 What’s New in Version 3.4.4.1000.10 ...................................................................................... 25

3.1.2 Known Constraints in Version 3.4.4.1000.10............................................................................ 29

3.1.3 Resolved Constraints in Version 3.4.4.1000.10 ........................................................................ 33

3.2 Version 3.4.3 .......................................................................................................................... 34

3.2.1 What’s New in Version 3.4.3 .................................................................................................... 34

3.2.2 Known Constraints in Version 3.4.3 ......................................................................................... 35

3.2.3 Resolved Constraints in Version 3.4.3 ..................................................................................... 39

3.3 Version 3.4.3 .......................................................................................................................... 40

3.3.1 What’s New in Version 3.4.3 .................................................................................................... 40

3.3.2 Known Constraints in Version 3.4.3 ......................................................................................... 42

3.3.3 Resolved Constraints in Version 3.4.3 ..................................................................................... 46

3.4 Version 3.4.2 .......................................................................................................................... 47

3.4.1 What’s New in Version 3.4.2 .................................................................................................... 47

3.4.2 Known Constraints in Version 3.4.2 ......................................................................................... 52

3.4.3 Resolved Constraints in Version 3.4.2 ..................................................................................... 57

3.5 Version 3.2.1.513 ................................................................................................................... 57

3.5.1 Resolved Constraints in Version 3.2.1.513 .............................................................................. 57

3.5.2 Known Constraints in Version 3.2.1.513 .................................................................................. 59

3.6 Version 3.4.2.229 ................................................................................................................... 62

3.6.1 Known Constraints in Version 3.4.2 ......................................................................................... 62

3.7 Version 3.2.1.488 ................................................................................................................... 64

3.8 Version 3.21.474 .................................................................................................................... 64

3.9 Version 3.2.1.438 ................................................................................................................... 65

3.10 Version 3.2.1.391 ................................................................................................................... 66

3.11 Version 3.2.1.236.59 .............................................................................................................. 67

3.12

Version 3.1.4 .......................................................................................................................... 69

3.13 Version 3.1.3 .......................................................................................................................... 72

3.14 Version 3.1.2 .......................................................................................................................... 75

3.15 Version 3.1.1 .......................................................................................................................... 79

3.16 Version 3.1.0 .......................................................................................................................... 80

3.17 Version 3.0.4 .......................................................................................................................... 84

3.17.1 450HD Phone ......................................................................................................................... 87

3.17.2 All Phones ............................................................................................................................... 90

3.18 Version 3.0.1 .......................................................................................................................... 96

Version 3.4.4 3 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

List of Tables

Table 1-1: Specifications .........................................................................................................................................8

Table 1-2: Supported 400HD Series Models ......................................................................................................... 16

Table 2-1: Known Constraints in Version 3.4.4 ...................................................................................................... 20

Table 2-2: Resolved Constraints in Version 3.4.4 .................................................................................................. 24

Table 3-1: Known Constraints in Version 3.4.4 ...................................................................................................... 29

Table 3-2: Resolved Constraints in Version 3.4.4 .................................................................................................. 33

Table 3-3: Known Constraints in Version 3.4.3 ...................................................................................................... 35

Table 3-4: Resolved Constraints in Version 3.4.3 .................................................................................................. 39

Table 3-5: Known Constraints in Version 3.4.3 ...................................................................................................... 42

Table 3-6: Resolved Constraints in Version 3.4.3 .................................................................................................. 46

Table 3-7: Known Constraints in Version 3.4.2 ...................................................................................................... 52

Table 3-8: Resolved Constraints in Version 3.4.2 .................................................................................................. 57

Table 3-9: Resolved Constraints in Version 3.2.1.513 ........................................................................................... 57

Table 3-10: Known Constraints in Version 3.2.1.513 ............................................................................................. 59

Table 3-11: Known Constraints in Version 3.4.2 .................................................................................................... 62

Table 3-12: Known Teams-Compatible (a.k.a. 3PIP) Device Limitations in Teams Environments........................... 66

Version 3.4.4 4 Document #: LTRT-08492

Release Notes Notices

Notice

Information contained in this document is believed to be accurate and reliable at the time of printing. However, due to ongoing product improvements and revisions, AudioCodes cannot guarantee accuracy of printed material after the Date Published nor can it accept responsibility for errors or omissions. Updates to this document can be downloaded from https://www.audiocodes.com/library/technical-documents.

This document is subject to change without notice.

Date Published: Jan-10-2021

WEEE EU Directive

Pursuant to the WEEE EU Directive, electronic and electrical waste must not be disposed of with unsorted waste. Please contact your local recycling authority for disposal of this product.

Customer Support

Customer technical support and services are provided by AudioCodes or by an authorized AudioCodes Service Partner. For more information on how to buy technical support for AudioCodes products and for contact information, please visit our website at https://www.audiocodes.com/services-

support/maintenance-and-support.

Stay in the Loop with AudioCodes

Abbreviations and Conventions

Each abbreviation, unless widely used, is spelled out in full when first used.

Version 3.4.4 5 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

Documentation Feedback

AudioCodes continually strives to produce high quality documentation. If you have any comments (suggestions or errors) regarding this document, please fill out the Documentation Feedback form on our website at https://online.audiocodes.com/documentation-feedback.

Version 3.4.4 6 Document #: LTRT-08492

Release Notes 1. Introduction

1 Introduction

Version 3.4.4 is a Microsoft Teams compatible version release. These Release Notes describe the new features and known and resolved restraints for AudioCodes’ 445HD, 450HD, C450HD IP Phones, the RX50 Conference Phone and the Huddle Room Solution.

Note: Microsoft ‘Teams Compatible’ is supported by AudioCodes’ Skype for Business devices.

1.1 Overview

These Release Notes describe the new features and known and resolved restraints for AudioCodes’

 445HD, 450HD, C450HD IP Phones - Teams compatible

 RX50 Conference Phone - Teams compatible  Huddle Room Solution (HRS) - Teams compatible

1.1.1 About the RX50 Conference Phone

The AudioCodes RX50 Conference Phone, developed in partnership with Dolby®, delivers a superior meeting room experience (RX) with outstanding audio quality in rooms of any shape or size.

Packaged in a sleek, modern design, the RX50 is impressively easy to use and manage. Leveraging advanced audio quality technology and dynamic leveling, the RX50 produces clear, natural-sounding audio regardless of acoustic challenges in the room. Quiet or distant voices are boosted, while unwanted noise is suppressed, to ensure everyone can be heard, regardless of room shape or size. The phone features a pickup range of 6m / 20ft.

Sharing the intuitive design principles used in AudioCodes IP phone devices, the RX50’s touch screen user interface simplifies meeting and device management. The RX50 is fully integrated with the AudioCodes Device Manager for centralized management and monitoring by the enterprise IT team.

1.1.2 Differentiating RX50 from AudioCodes’ Other Phone Models

The RX50 Conference Phone shares features with other AudioCodes phone models but is also unique in a number of respects.

Similarly to AudioCodes’ Huddle Room Solution (HRS), the RX50 functions as a shared space device but:

 Device Lock is disabled by default  The User cannot sign out; only Admin can sign out

 The Call Forward feature is removed

 The Missed Calls notification is missing in the main screen though if an enterprise wants it, it can

be configured as a Programmable Key.

 Boss-Admin is currently not supported

 VVM / Voice Mail is currently not supported  Better Together over Ethernet (BToE) is currently not supported

Version 3.4.4 7 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

2.4GHz, Dual Band 5GHz (C450HD

G.711, G.723.1 (all except RX50), G.729A/B (all except RX50),

1.1.3 About AudioCodes’ 400HD Series of Teams-Compatible IP Phones

AudioCodes' 400HD Series of Teams-compatible IP phones offer enhanced voice quality and clarity for users of Microsoft Unified Communications. The phones' wide range of essential business features, reliability and certified interoperability make them the perfect choice for any Team s-compatible deployment, from small businesses up to large multi-site enterprises.

AudioCodes is a leading Microsoft partner with a complete offering of voice-enabling solutions for the Microsoft Teams-compatible market. In addition to IP phones, AudioCodes’ portfolio for Microsoft Teamscompatible includes Media Gateways, Survivable Branch Appliances (SBA), Enterprise Session Border Controllers (E-SBCs), and Call Recording.

1.2 400HD Series IP Phones Specifications

The table below summarizes the specifications of AudioCodes' 400HD Series IP Phones for Microsoft Team s-compatible.

Table 1-1: Specifications

Feature Details

VoIP Signaling Protocols

Data Protocols

Media Processing

Telephony Features

 SIP: RFC 3261, RFC 2327 (SDP)

 IPv4, TCP, UDP, ICMP, ARP, DNS and DNS SRV for SIP Signaling  SIP over TLS (SIPS)  802.1x  802.1p/Q for Traffic Priority and QoS  VLAN Discovery Mechanism (CDP, LLDP)  ToS (Type of Service) field, indicating desired QoS DHCP Client  NTP Client  Microsoft Teams Compatible (previously Skype for Business)  MS-ICE2  SHA2 - Open SSL 1.0.1 integrated with TLS 1.2, supporting SHA256,

replaced the previous OpenSSL 0.9.8 and TLS 1.0 stacks to comply with Microsoft Teams compatible security requirements

 OpenSSL 1.0.1m, supporting SHA2 algorithms  OVR (One Voice Resiliency)  Wi-Fi (445HD and C450HD): Single band

only), 802.11b/g/n

 Wideband audio support for Bluetooth headsets (Beta)

 Voice Coders:

G.722 8000 / G.722 16000), SILK 8000/SILK 16000 (445HD, 450HD, C450HD and HRS), LN.

 Acoustic Echo Cancelation  Adaptive Jitter Buffer 300 msec  Voice Activity Detection  Comfort Noise Generation (RX50 is supported for G.729 but not for G.711

and G.722)

 Packet Loss Concealment  RTP/RTCP Packetization (RFC 3550, RFC 3551), SRTP (RFC 3711)  DTMF Relay (RFC 2833)

 Multiple BLF presence  Busy on Busy

Version 3.4.4 8 Document #: LTRT-08492

Release Notes 1. Introduction

Call Park (phone can park up to 5 calls to a parking lot)



 

Feature Details

  Group Call Pickup  Call Hold / Un-Hold  Call Transfer; the TRANSFER key's functionality (Blind Transfer) can be

changed to Consultative Transfer.

 Multi-Party Teams Compatible Remote Conferencing utilizing CCCP

(Centralized Conference Control Protocol)

 Redial (all devices are supported except RX50)  Caller ID Notification  Call Waiting Indication, including Caller ID  Message Waiting Indication (including MWI LED) (all devices are supported

except RX50)

 Local and Corporate Directories  T9 predictive text for Corporate Directory search (all devices are supported

except RX50)

 Automatic Answering (Alert-Info header and "talk" event)  Automatic On-hook Dialing (all devices are supported except RX50)  Call Logs: Missed/Received Calls and Dialed Numbers  Speed Dials  Boss Admin (not supported on HRS and RX50)  URL Dialing  Call Forward (Do not forward, Forward to voice mail, Forward to a number)

(all devices are supported except RX50)

 Dial plan (supports normalization rules downloaded from the Skype for

Business server via in-band provisioning)

 Paging w/without Barge-in. Configurability of special keys as paging group

dials. (All devices are supported except HRS and RX50).

 Better Together over Ethernet (BToE) compatible with Microsoft Teams. (All

devices are supported except HRS and RX50).

Automatically pairing the phone with the PC/laptop based Skype for

Business client.

Video calls: Voice routed to phone; phone performs as a USB device. Switching audio devices (when automatic pairing).

 Voicemail (including capability to secure user access with PIN code) (all

devices are supported except RX50)

 Visual Voice Mail (all devices are supported except RX50)  Integration with Microsoft Exchange Server (Calendar), including meeting

reminders

 Automatic device lock  Handles up to 8 concurrent calls (450HD)  Merge option: Two separate calls can be merged into one conference  Integrated Skype for Business ''Favorites”  Location service  Emergency dial (911 service, etc.)  HotDesk  Call Log is synchronized  Power Saving mode (450HD) Backlight Timeout (all other phones when

online)

Version 3.4.4 9 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

Malicious call tracing

Screen themes (450HD)

Manager Pro | Express

Feature Details

Configuration / Management

Debugging Tools

Supported Languages

[Note that on the RX50 the virtual keypad is fully supported for all languages besides Chinese and Japanese. For non-supported languages, the virtual keypad is in English.]

  Voice Quality Check



 Device update: Skype for Business server updates the phone's firmware

version if different

 Quality of Experience (QoE) reports sent to Microsoft's SQL server (currently

not supported in RX50)

 Phone User Interface Language Support (Various Languages)  Web-based Management (HTTP/HTTPS) with fully integrated login  One Voice Operations Center (OVOC) module Device  Auto-Provisioning (via TFTP, FTP, HTTP, and HTTPS) for firmware and

proprietary configuration file upgrade

 In-Band Provisioning  DHCP options (66, 67, and 160) for auto-provisioning  DHCP options (120, 60, and 77) for device information  DHCP option (42 or 4) for the NTP server  DHCP option (43) for the URL of the Certificate Provisioning service  DHCP option (2) for the Time Zone Offset  Skype for Business Contacts  LDAP (Lightweight Directory Access Protocol)  Private Labeling Mechanism  Configuration file encryption (Entire file and individual parameters)  Access via Telnet or SSH (SSH applies to 445HD, 445HD-R, 450HD,

C450HD, HRS and RX50)

 System Logging (Syslog)  Monitoring (Ping and Traceroute)  DSP Recording  Crash Dump  Port Mirroring  Tracing  Core Dump  Log upload to Microsoft server (certification for 3

party Skype for Business

clients)

 English  Spanish  Russian  German  Ukrainian  French  Italian  Hebrew  Polish  Portuguese (displayed only if included in your Feature Key)  Korean  Finnish  Simplified Chinese

Version 3.4.4 10 Document #: LTRT-08492

Release Notes 1. Introduction

Traditional Chinese

 



 



   

 

  

           SPEAKER (including LED)

Feature Details

  Hungarian  Japanese  Slovak  Czech  Latvian (contact person information)  Dutch  Magyar

RX50 Hardware

 4.3 inch touch screen (480x272) with an intuitive user interface.  Connectors interfaces:

1 x RJ-45 ports (10/100 BaseT Ethernet) for WAN 2 x HDMI ports for Satellite Microphones

 Power:

PoE Class 3: IEEE802.3af

 Keys:

MUTE (including LED) VOLUME control keys

 Speaker  Optional satellite microphone kit Room Experience Suite pickup reach by 2

meters / 6.5 feet

445HD Hardware

 Color Screen 4.3": Graphic, 480x272 resolution  Integrated sidecar 376x60 resolution featuring 12 programmable speed dial

keys with presence monitoring (BLF)

 Connectors interfaces:

2 x RJ-45 ports (10/100/1000BaseT Ethernet) for WAN and LAN (GbE

support)

RJ-9 port (jack) for headset RJ-9 port (jack) for handset USB interface for USB headset support RJ-11 interface for DHSG

 Mounting:

Wall and desktop mounting options

Version 3.4.4 11 445HD, 450HD, C450HD, RX50 and HRS

One angle for desktop mount, another angle for wall mount

 Power:

DC jack adapter 12V Power supply AC 100 ~ 240V PoE Class 2: IEEE802.3af (optional)

 Keys:

4 softkeys and 6 multifunction hard keys VOICE MAIL message hotkey (including LED) 4-way navigation button with OK key MENU REDIAL HOLD MUTE (including LED) TRANSFER VOLUME control key HEADSET (including LED)

445HD, 450HD, C450HD, RX50 and HRS

Headset

             

 

        Sennheiser MB Pro 2

    

 

  

    MENU

Feature Details

445HD Headset Compatibility

 For a comprehensive list of supported Jabra headsets, see the Jabra

Compatibility Guide

 For a comprehensive list of supported Plantronics headsets see

http://www.plantronics.com/us/compatibility-guide/#/search/

 For a comprehensive list of supported VXi products, see

http://www.vxicorp.com/compatibility_guide/

 Also, the following which aren't documented online yet:

Jabra UC-150 Jabra Speak 510+ Jabra Speak 410 Jabra MOTION OFFICE Jabra PRO 9470 Jabra Evolve Series 20, 30, 40, 75, 80 Microsoft LX-3000 Plantronics C-310M Plantronics C-320M Plantronics HW720 Plantronics Blackwire Series 300, 325, 510, 520, 710 Jabra UC-550 Jabra Pro 920 EHS wireless headset Jabra Pro 9450 EHS wireless headset

 Supported Bluetooth speakers:

Jabra Speaker 510 Calistro 620

 Supported Bluetooth headsets:

Jabra Evolve 65 Jabra Evolve 75 Jabra Halo Smart Plantronics Explorer 10 Plantronics Voyager Legend Plantronics Voyager 5200 Plantronics Voyager Focus

450HD Hardware

 Large (800 x 480), graphical, high-resolution, 5-inch color touch (TFT) screen

with an intuitive touch-oriented user interface design.

Version 3.4.4 12 Document #: LTRT-08492

 Connectors interfaces:

2 x RJ-45 ports (10/100/1000BaseT Ethernet) for WAN and LAN RJ-9 port (jack) for headset RJ-9 port (jack) for handset USB interface for USB headset support RJ-11 interface for DHSG

 Mounting:

Wall and desktop mounting options One angle for desktop mount, another angle for wall mount

 Power:

DC jack adapter 12V Power supply AC 100 ~ 240V PoE Class 3: IEEE802.3af (optional)

 Keys:

8 x softkeys VOICE MAIL message hotkey (including LED) 4-way navigation button with OK key

Release Notes 1. Introduction

 REDIAL     

Headset

              Jabra Pro 9450 EHS wireless headset

   



 

  

       MUTE (including LED)

Feature Details

HOLD MUTE (including LED) TRANSFER VOLUME control key HEADSET (including LED)

 SPEAKER (including LED)

450HD Headset Compatibility

 For a comprehensive list of supported Jabra headsets, see the Jabra

Compatibility Guide

 For a comprehensive list of supported Plantronics headsets see

http://www.plantronics.com/us/compatibility-guide/#/search/

 For a comprehensive list of supported VXi products, see

http://www.vxicorp.com/compatibility_guide/

 Also, the following which aren't documented online yet:

C450HD Hardware

 Five-inch color capacitive 1280 x 720 high-resolution touch (TFT) screen  Connectors interfaces:

2 x RJ-45 ports (10/100/1000BaseT Ethernet) for WAN and LAN RJ-9 port (jack) for headset RJ-9 port (jack) for handset 2 x USB ports for headset support

- USB white port - host port

- USB black port - device port (default) but it can be configured to host port

RJ-11 interface for DHSG

Version 3.4.4 13 445HD, 450HD, C450HD, RX50 and HRS

 Mounting:

Wall and desktop mounting options One angle for desktop mount, another angle for wall mount

 Power:

DC jack adapter 12V Power supply AC 100 ~ 240V PoE Class 3: IEEE802.3af (optional)

 Keys:

8 x softkeys VOICE MAIL message hotkey (including LED) 4-way navigation button with OK key MENU REDIAL HOLD

445HD, 450HD, C450HD, RX50 and HRS

 TRANSFER  

Headset

             

 

        Sennheiser MB Pro 2

    

 

  

Feature Details

VOLUME control key HEADSET (including LED)

 SPEAKER (including LED)

C450HD Headset Compatibility

 For a comprehensive list of supported Jabra headsets, see the Jabra

Compatibility Guide

 For a comprehensive list of supported Plantronics headsets see

http://www.plantronics.com/us/compatibility-guide/#/search/

 For a comprehensive list of supported VXi products, see

http://www.vxicorp.com/compatibility_guide/

 Also, the following which aren't documented online yet:

 Supported Bluetooth speakers:

Jabra Speaker 510 Calistro 620

 Supported Bluetooth headsets:

Jabra Evolve 65 Jabra Evolve 75 Jabra Halo Smart Plantronics Explorer 10 Plantronics Voyager Legend Plantronics Voyager 5200 Plantronics Voyager Focus

HRS Hardware

Version 3.4.4 14 Document #: LTRT-08492

 Large (800 x 480), graphical, high-resolution, 5-inch color touch (TFT) screen

with an intuitive touch-oriented user interface design.

 Connectors interfaces:

2 x RJ-45 ports (10/100/1000BaseT Ethernet) for WAN and LAN RJ-9 port (jack) for speaker RJ-9 port (jack) for handset USB interface for USB speaker support RJ-11 interface for DHSG

 Mounting:

Wall and desktop mounting options One angle for desktop mount, another angle for wall mount

 Power:

DC jack adapter 12V Power supply AC 100 ~ 240V PoE Class 2: IEEE802.3af (optional)

 Keys:

Release Notes 1. Introduction

 8 x softkeys         

UC-HRS-457 or UC-HRS-458

Feature Details

VOICE MAIL message hotkey (including LED) 4-way navigation button with OK key MENU REDIAL HOLD MUTE (including LED) TRANSFER VOLUME control key HEADSET (including LED)

 SPEAKER (including LED)  HRS speaker / speakers, per the selected configuration:

Version 3.4.4 15 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

1.3 Supported Models

The table below shows the supported AudioCodes 400HD Series models.

Note: AudioCodes’ Skype for Business devices support Microsoft ‘Teams Compatible’.

Table 1-2: Supported 400HD Series Models

Part Number Product Description

UC450HDEG

UC450HDEPSG

RX50 Skype for Business RX50 Conference Phone

UC445HDEG

UC445HDG-R

UC445HDEPSG

UC445HDEPSG-R

UC445HDEG-BW

Skype for Business 450HD IP Phone PoE GbE Black 2 Ethernet 10/100/1000 ports, 800x480 5'' Color Touch LCD and Power over Ethernet (PoE)

Skype for Business 450HD IP Phone PoE GbE and external power supply Black 2 Ethernet 10/100/1000 ports, 800x480 5'' Color Touch LCD and Power over Ethernet (PoE)

Skype for Business 445HD IP Phone PoE GbE Black 2 Ethernet 10/100/1000 ports, 18 Programmable keys, 480x272 Graphic Color LCD, 376x60 BLF LCD featuring 12 programmable speed dial keys with presence monitoring, and Power over Ethernet (PoE)

Skype for Business 445HD IP Phone PoE GbE Black 2 Ethernet 10/100/1000 ports, 18 Programmable keys, 480x272 Graphic Color LCD, and Power over Ethernet (PoE)

Skype for Business 445HD IP Phone PoE GbE and external power supply Black 2 Ethernet 10/100/1000 ports, 18 Programmable keys, 480x272 Graphic Color LCD, 376x60 BLF LCD, and Power over Ethernet (PoE)

Skype for Business 445HD IP Phone PoE GbE and external power supply Black 2 Ethernet 10/100/1000 ports, 18 Programmable keys, 480x272 Graphic Color LCD, and Power over Ethernet (PoE)

Skype for Business 445HD IP Phone PoE GbE Black Wi-Fi and Bluetooth* connectivity, 2 Ethernet 10/100/1000 ports, 18 Programmable keys, 480x272 Graphic Color LCD, 376x60 BLF LCD, and Power over Ethernet (PoE).

* Supported in the USA, Canada, the EU, Switzerland and Israel, Wi-Fi and Bluetooth

require a specific CPN with a ‘BW’ suffix.

UC445HDEPSG-BW

UC450HDEG

UC450HDEPSG

Version 3.4.4 16 Document #: LTRT-08492

Skype for Business 445HD IP Phone PoE GbE Black Wi-Fi and Bluetooth* connectivity, with or without an external Power Supply, 2 Ethernet 10/100/1000 ports, 18 Programmable keys, 480x272 Graphic Color LCD, 376x60 BLF LCD, and Power over Ethernet (PoE).

* Supported in the USA, Canada, the EU, Switzerland and Israel, Wi-Fi and Bluetooth

require a specific CPN with a ‘BW’ suffix.

Skype for Business 450HD IP Phone PoE GbE Black 2 Ethernet 10/100/1000 ports, 800x480 5'' Color Touch LCD and Power over Ethernet (PoE)

Skype for Business 450HD IP Phone PoE GbE and external power supply Black 2 Ethernet 10/100/1000 ports, 800x480 5'' Color Touch LCD and Power over Ethernet (PoE)

Release Notes 1. Introduction

Part Number Product Description

UC-C450HDEG

UC-C450HDEG-BW

UC-C450HDEPSG

UC-C450HDEPSGBW

UC-HRS-457

UC-HRS-458

Skype for Business C450HD IP-Phone PoE GbE black 2 Ethernet 10/100/1000 ports, 1280x720 5'' Color Touch LCD and Power over Ethernet (PoE)

Skype for Business C450HD IP-Phone PoE GbE black with integrated BT and WiFi 2 Ethernet 10/100/1000 ports, 1280x720 5'' Color Touch LCD and Power over Ethernet (PoE)

Skype for Business C450HD IP-Phone PoE GbE with an external power supply Black 2 Ethernet 10/100/1000 ports, 1280x720 5'' Color Touch LCD and Power over Ethernet (PoE)

Skype for Business C450HD IP-Phone PoE GbE with integrated BT and WiFi and an external power supply black 2 Ethernet 10/100/1000 ports, 1280x720 5'' Color Touch LCD and Power over Ethernet (PoE)

Skype for Business 457 Huddle Room Solution (HRS) IP Phone including one external mid-size speaker and external power supply

Skype for Business 458 Huddle Room Solution (HRS) IP Phone including one external large-size speaker and external power supply

Version 3.4.4 17 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

This page is intentionally left blank.

Version 3.4.4 18 Document #: LTRT-08492

Release Notes 2. Version 3.4.4

2 Version 3.4.4

Note: Version 3.4.4 includes firmware build 3.4.4.1000.52.

2.1.1 What’s New in Version 3.4.4

Following are the new features released in Version 3.4.4:

 C450HD phone voice quality in handsfree mode has been improved. A new equalizer was

designed to improve the quality and the gain from the C450HD phone’s microphone was increased.

 The C450HD phone features capability to upgrade the Microsoft Teams firmware directly from

the Teams Compatible / Skype for Business partition. The feature helps network administrators

prepare deployed Teams Compatible phones with the latest Teams Native GA before moving to Team s Native. For detailed instructions, see the 400HD IP Phone Series Administrator's Manual

Ver. 3.4.4 - Teams Compatible, Appendix F (Switching Devices from Teams Compatible to Teams Native Mode).

Note: As of this version, the phone validates that the Native Teams version is version 1.8.288 or later

before allowing the user to switch from Teams Compatible / Skype for Business mode to Native Teams. The reason for the validation is to make sure the phone leverages the updated version that is aligned with Teams cloud.

Version 3.4.4 19 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

results in only the PC client ringing and being added to the call.

[EHS headset] The VoIP application may reload in rare scenarios in which two calls are received

2.1.2 Known Constraints in Version 3.4.4

Here are the constraints known to exist in Version 3.4.4

Table 2-1: Known Constraints in Version 3.4.4

Incident Description

- In an existing conference call, adding a user with a Teams compatible phone and a PC client

- The ‘Unmute All’ feature does not function in a Teams meeting.

- When escalating a P2P call to a conference with a Teams compatible phone, only the conference initiator’s device displays the conference Roster.

In the Teams-compatible phone, when a Discreet call is attempted, the ‘caller’ successfully establishes the ‘call’ but the auto answer feature on the other side isn’t functioning and the user (typically, a member of the organization’s security staff) must manually pick up the ‘call’.

IPPUC-3050

IPPUC-2110

IPPUC-3555 [445HD][Multicast Paging] The phone displays an incorrect paging title.

IPPUC-3361 On rare occasions, the wrong contact picture is displayed during a call and in the Call Log.

IPPUC-1395

IPPSFB-9813

- [RX50] MoH is currently not supported.

- [RX50] Microsoft Device update is currently not supported.

- [RX50] Only the default Call Progress Tones (USA standard) is currently supported.

- [RX50] The debugging tools of TDM and network recording are currently not supported.

[C450HD and 445HD Bluetooth] Voice Quality in Bluetooth: The remote party may hear clicks during a call.

[445HD Bluetooth] In some scenarios (such as when pairing and then unpairing or when switching from Bluetooth headset to USB headset), the VoIP application may reload.

[C450HD and 445HD] [Wi-Fi] The Wi-Fi MAC field is not recognized as an AudioCodes known MAC. As a result, the Device Manager counts such phones as ‘non AudioCodes devices’ thus causing a licensing issue with the Device Manager and some Device Manager features do not function (the logo, for example, is missing).

simultaneously.

[RX50] Only 20 milliseconds is currently supported for the Packetization time; do not change the default coder list.

[RX50] It’s advisable to restore all RX50 devices with versions earlier than 3.4.2.200 to their default settings as the layouts of some screens were subsequently modified.

IPPUC-2488

IPPUC-3011

IPPUC-3012

IPPUC-3187

- [RX50] When changing volume while talking, audio at the far end is cut.

- [RX50] During the start up procedure, a short click is heard on the speaker.

Version 3.4.4 20 Document #: LTRT-08492

[RX50] The progress bar indicating the upgrading process is sometimes missing. Note that the upgrading process takes 18-20 minutes.

[RX50] [Phone Device Lock] When enabling the phone Device Lock feature, the only lock option is a complete lock; there’s no option for a partial lock that allows outgoing calls, etc.

[RX50] [Phone Device Lock] There’s no Lock softkey to lock the phone manually.

[RX50] [Phone Device Lock] The Emergency softkey should be displayed in the locked screen.

[RX50] [Phone Device Lock] There’s no HotDesk softkey.

Release Notes 2. Version 3.4.4

[RX50] When directly calling a user’s voicemail, the ‘digits’ softkey is missing (and this preventing

headset several times may result in the

Admin] Retrieving a parked call ‘On behalf’ doesn't appear on the sidecar.

transfer, conference roster screen. In these scenarios, a regular call may start similarly to a video

Exchange

Incident Description

IPPUC-3191

[RX50] After a user adds a contact to their Favorites, the option to ‘un-favorite’ that contact is missing.

IPPUC-3177

some advanced options like ‘Press the # for more options’).

IPPSFB-4052 [405HD] The Microsoft Device Update (via CAB file) is not supported in this version release.

IPPSFB-8053 Semi-Attended Transfer does not function flawlessly in this release.

IPPSFB-2080

[USB headset] Trying to disconnect / reconnect the USB phone becoming 'stuck’ and may require a reboot.

IPPSFB-7169 [445HD Wi-Fi] Wi-Fi phone screens are currently available only in English.

IPPSFB-7135 [445HD Wi-Fi] When Wi-Fi is in use, BToE automatic pairing is not supported.

IPPSFB-6815 [445HD Wi-Fi] Switching between a wired and a Wi-Fi connection requires a phone reboot.

IPPSFB-8152 [C450HD, 445HD] [Wi-Fi] Provisioning using TFTP may fail due to timeout.

- [450HD] Downgrading the phone’s firmware to version 3.0.0.410.24 (released in 2016) may damage the phone. This firmware version may be the default in the Device Manager (IP Phone Manager) deployed in old CloudBond installations. If you see that this firmware version is the default, replace it with the current 450HD GA firmware version before adding 450HD phones.

IPPSFB-8477 [445HD/C450HD] QoE report modifications related to signal level are incorrect.

106161

[Boss-Admin] A user whose name starts with a small letter and who is configured as Admin, is displayed on the Boss' phone as a URI address rather than with the display name.

106517

[Multiple 440HD Boss-Admin] When there is a crossed delegation, i.e., when Admin 1 is Boss of Admin 2 and Admin 2 is Boss of Admin 1), the Boss doesn't see the call when Admin answers the call.

106254

[Multiple 440HD BossIf the call is not parked, there is no issue.

105852

[BToE] In the scenarios listed below, the phone performs as a PC playback device and not as a standalone phone. Some call management capabilities consequently go missing, e.g., hold,

call, i.e., the phone is used as the PC playback device. Example scenarios:

 RGS/Delegate call made ‘on behalf’ from the PC client  Call from IM (Instance Message) that was opened before the phone was paired.

This is aligned with Microsoft's BToE implementation.

106432

[BToE with Delegation] When a video call comes in to the Boss, a paired Admin phone will not ring but can accept the call. This is aligned with Microsoft's BToE implementation of video calls.

104326

['Favorites'] The phone does not retrieve Outlook contacts from on-premises Microsoft servers.

103639

[Multi-Party Remote Conferencing] When a conference is locked, the phone cannot add a user (Team s client or other certified phone) if not admitted within 15 seconds.

103927 Sometimes, the user is unable to join a Teams Meeting whose configured 'End time' has passed.

- [BToE] BToE does not function if PC users are switched without logging off first.

[BToE - PC application] Windows 10 users who have the BToE PC application already installed on their PCs must uninstall it before installing the new version of the application.

104040

[BToE] When a paired user answers an incoming team-call, the phone does not present the call as a team-call.

Version 3.4.4 21 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

in or if a user is

They

will free up, the call will not occupy the free index. A newly free index will be occupied by the next

occasions, switching between calls displayed

Incident Description

104039

103961

103827

100827

103573

103572 [Boss-Admin in a conference scenario] Admin can't set up a meeting on behalf of Boss.

93495 The Web interface displays some screens that are inapplicable to Skype for Business.

- Voicemail is supported for Microsoft Exchange Server 2013 and later.

[BToE] When a paired user answers a delegated call, the phone does not show that it's a delegated call.

[BToE video] A paired user cannot answer a second incoming call via the Teams client when having an active video call.

[BToE video] On a PC with low CPU resources, interference in the voice of a video call might be experienced.

[Boss Admin] Response Group: A call initiated by Admin on Boss' behalf to Response Group cannot be picked up by Boss.

[Boss-Admin in a conference scenario] The Rosters screen does not indicate if a participant is 'On behalf'.

Call Log information is saved to the phone file system once every six hours. Consequently, Call Log information such as missed, received and outgoing calls may not be saved after restarting. [Only relevant if Microsoft Exchange isn't used, i.e., if a user performs a PIN signwithout Microsoft Exchange].

[Multiple Boss-Admin with SHARED_LINE] The phone can present up to 12 incoming calls on the phone's sidecar. Calls over and above the 13th call will not be managed on the sidecar. will not be displayed nor will they be capable of being picked up. Even if an index on the sidecar

107516

incoming call.

[Multiple Boss-Admin with SHARED_LINE] The phone is currently capable of simultaneously handling up to eight calls per line (configured with the 'number_of_calls_per_line' parameter). If eight calls are concurrently managed on the phone, attempting to pick up an additional call will fail. Other phones in the group can still pick up the call.

[Multiple Boss-Admin with SHARED_LINE] Simultaneous configuration of this feature (the 440HD phone's 'Delegated Line' feature) and the phone's BToE feature is not supported.

[Multiple Boss-Admin with SHARED_LINE] Accepting, rejecting and resuming calls must be performed using the softkeys or by picking up the handset. They cannot be performed from the audio device keys – speaker/headset.

[Multiple Boss-Admin with SHARED_LINE] On rare in the phone's sidecar, i.e., picking up calls in succession, one after the other, may cause the phone to handle some pickups incorrectly; best practice is therefore to wait five seconds between each pickup to allow the previous action to finish.

[Multiple Boss-Admin with SHARED_LINE] On rare occasions, ending several calls too fast may cause unexpected behavior; best practice therefore is to have a 5-second delay between actions.

[Multiple Boss-Admin with SHARED_LINE] If two phones simultaneously try to pick up two calls held by a certain phone, one of the pickups may fail. Re-attempting to pick up will be successful.

[USB headset] [Plantronics C320] Using the ‘Mute’ key from the USB headset is not recommended since the headset may lose synchronization with the phone. It's preferable to use the phone's mute key instead.

107485

Version 3.4.4 22 Document #: LTRT-08492

[USB headset] [Jabra HSC016] Using the volume keys on this headset is not recommended as they send an unexpected unmute command. It's advisable to use the phone’s mute key and volume up/down keys instead.

Release Notes 2. Version 3.4.4

Incident Description

IPPSFB-4682

IPPUC-3709

IPPUC-3829

IPPUC-3755

IPPUC-5378

IPPUC-4507

[USB headset] [Jabra Evolve 65] The headset hook key cannot be used to accept an incoming call. Instead, the incoming call can be answered from the phone.

[USB headset] [Plantronics Savi W440-M] Calls can’t be disconnected via the headset hook control.

[445HD] [Boss-Admin] Configuring a delegation deletes the speed dial from the phone screen (because it uses the same keys). Speed dial information is kept in the Device Manager Pro | Express (formerly known as the IP Phone Manager). The speed dial reappears in the phone screen when delegation is disabled.

[Virtual Keypad] When long-pressing a key on the Virtual Keypad, the key may get stuck in longpress mode.

[Multicast Paging] A noise may be heard during a paging call if the phone is already occupied with more than three calls in parallel.

[RX50] Detection of Broken RTP isn’t supported and as a result, a call will not be closed due to broken RTP. The capability helps with disconnected calls (disrupted audio).

[445HD, C450HD] [Bluetooth] In some Bluetooth headsets models (mainly in Plantronics headsets), a short, annoying high-frequency tone is heard before the dial tone and sometimes even during the call.

[Skype for Business] [BToE with Video] It’s impossible to escalate video when users try it at the same time.

[Applies only to C450HD/445HD] An endless auto-negotiation with the Ethernet switch may occur if the phone is connected to the Power Supply and to PoE simultaneously. It’s recommended to avoid connecting them simultaneously even though no damage occurs. If a Power Supply is used, users should disable the power from the ETH port.

Version 3.4.4 23 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

n rare occasions, no voice is heard when answering a call

2.1.3 Resolved Constraints in Version 3.4.4

Here are the constraints that were resolved in Version 3.4.4

Table 2-2: Resolved Constraints in Version 3.4.4

Incident Description

IPPUC-5345 [445HD SILK] Noises are heard when the call is put on hold.

IPPUC-5752

IPPUC-5943 [C450HD and C445HD] Bluetooth is not automatically paired after the phone is rebooted.

[C450HD and C445HD] [Bluetooth] O using the Bluetooth headset.

Version 3.4.4 24 Document #: LTRT-08492

Release Notes 3. Previous Releases

3 Previous Releases

3.1 Version 3.4.4.1000.10

Note: Version 3.4.4 includes firmware build 3.4.4.1000.10.

3.1.1 What’s New in Version 3.4.4.1000.10

Following are the new features released in Version 3.4.4:

 SILK wideband is supported on the 445HD phone.

 The RX50 Conference Phone by default does not include a sign-in key for users. Sign-in can be

performed by users with Administrator privilege (via MENU > Admin key).

 The RX50 Conference Phone by default includes a new Pair key. This key won’t appear after

upgrading from earlier firmware versions but will appear after restoring to the phone’s default settings. The key is for the upcoming Duo feature.

 Wideband audio for Bluetooth headsets is supported as Beta. In previous releases, only narrow

band audio was supported. Voice quality has consequently improved. (Applies to the C450HD and 445HD phone models).

 The phone’s Expansion Module now supports two pages and a total of 40 Functional Keys,

each page displaying 20 Functional Keys (compared to 22 Functional Keys with only one page in previous releases). Users swipe right or left (depending on what page they’re on) to

transition from page to page. (Applies to the C450HD and 450HD phone models).

 The RX50 conference phone supports Voice Quality reports in compliance with the IETF’s RFC

6035, except for the following VQ local metrics that are not provided:

• Jitter buffer statistics

• Burst and Gapp loss

• Signal and noise levels

• Voice Quality estimation

 Users can view a Zoom meeting in the phone’s Calendar as shown in the next figure, identified

by the Zoom icon

Version 3.4.4 25 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

 Users can join a Zoom meeting by selecting it in the phone Calendar (identified by the Zoom icon)

and then selecting the Join softkey, as shown in the next figure. The ‘Join’ is performed as ‘automatic dial-in’.

 The Teams logo was added to the Teams meeting in the phone Calendar:

 The Virtual Keyboard features new capabilities.

• When users press a key, the keyboard shows the key that was pressed in a popup above

the key’s physical location.

Version 3.4.4 26 Document #: LTRT-08492

Release Notes 3. Previous Releases

• A popup for inputting special characters into fields has been added for improved user

experience.

 A new eye icon in the ‘Password’ field lets users view the password they inputted to make

sure they inputted it correctly.

By default, the password is masked, and the icon is an open eye indicating that if the user clicks it, the password will be unmasked for the user to make sure their input was correct. When the password is unmasked, the eye icon is struck through.

 Transfer a call to a remote party with whom a call was previously established

Allows a user to transfer a call to another person with whom a call was established, by selecting the call from a list of calls. The user can consult with any person with whom a call was established without needing to use the Consultation Transfer procedure. The feature is activated through the Xfer softkey. Users then press the Menu softkey, select Calls and then select the active call. The call is then transferred to the remote party with whom that call was established.

Version 3.4.4 27 445HD, 450HD, C450HD, RX50 and HRS

445HD, 450HD, C450HD, RX50 and HRS

 Merge a call with an existing (active) call / multiple calls / all calls or with an existing (active)

remote conference. The feature is activated through the Call Menu softkey. The user then selects Merge calls and then selects the preferred option.

 [450HD / C450HD] For Boss Admin configuration, a Boss/Admin bar is displayed so visible

Programmable Keys in the idle screen are 1-6 [Indexes 0-5] and not Programmable Keys 1-3 [Indexes 0-2] and Programmable Keys 5-7 [Indexes 4-6] as in previous GA versions.

Version 3.4.4 28 Document #: LTRT-08492

Release Notes 3. Previous Releases

results in only the PC client ringing and being added to the call.

ch two calls are received

3.1.2 Known Constraints in Version 3.4.4.1000.10

Here are the constraints known to exist in Version 3.4.4

Table 3-1: Known Constraints in Version 3.4.4

Incident Description

- In an existing conference call, adding a user with a Teams compatible phone and a PC client

- The ‘Unmute All’ feature does not function in a Teams meeting.

- When escalating a P2P call to a conference with a Teams compatible phone, only the conference initiator’s device displays the conference Roster.

IPPUC-3050

IPPUC-2110

IPPUC-3555 [445HD][Multicast Paging] The phone displays an incorrect paging title.

IPPUC-3361 On rare occasions, the wrong contact picture is displayed during a call and in the Call Log.

IPPUC-1395

IPPSFB-9813

- [RX50] MoH is currently not supported.

- [RX50] Microsoft Device update is currently not supported.

- [RX50] Only the default Call Progress Tones (USA standard) is currently supported.

- [RX50] The debugging tools of TDM and network recording are currently not supported.

[C450HD and 445HD Bluetooth] Voice Quality in Bluetooth: The remote party may hear clicks during a call.

[445HD Bluetooth] In some scenarios (such as when pairing and then unpairing or when switching from Bluetooth headset to USB headset), the VoIP application may reload.

[EHS headset] The VoIP application may reload in rare scenarios in whi simultaneously.

[RX50] Only 20 milliseconds is currently supported for the Packetization time; do not change the default coder list.

[RX50] It’s advisable to restore all RX50 devices with versions earlier than 3.4.2.200 to their default settings as the layouts of some screens were subsequently modified.

IPPUC-2488

IPPUC-3011

IPPUC-3012

IPPUC-3187

- [RX50] When changing volume while talking, audio at the far end is cut.

- [RX50] During the start up procedure, a short click is heard on the speaker.

Version 3.4.4 29 445HD, 450HD, C450HD, RX50 and HRS

[RX50] The progress bar indicating the upgrading process is sometimes missing. Note that the upgrading process takes 18-20 minutes.

[RX50] [Phone Device Lock] When enabling the phone Device Lock feature, the only lock option is a complete lock; there’s no option for a partial lock that allows outgoing calls, etc.

[RX50] [Phone Device Lock] There’s no Lock softkey to lock the phone manually.

[RX50] [Phone Device Lock] The Emergency softkey should be displayed in the locked screen.

[RX50] [Phone Device Lock] There’s no HotDesk softkey.

445HD, 450HD, C450HD, RX50 and HRS

[RX50] When directly calling a user’s voicemail, the ‘digits’ softkey is missing (and this preventing

[USB headset] Trying to disconnect / reconnect the USB headset several times may result in the

Retrieving a parked call ‘On behalf’ doesn't appear on the sidecar.

transfer, conference roster screen. In these scenarios, a regular call may start similarly to a video

premises Microsoft Exchange

Incident Description

IPPUC-3191

[RX50] After a user adds a contact to their Favorites, the option to ‘un-favorite’ that contact is missing.

IPPUC-3177

some advanced options like ‘Press the # for more options’).

IPPSFB-4052 [405HD] The Microsoft Device Update (via CAB file) is not supported in this version release.

IPPSFB-8053 Semi-Attended Transfer does not function flawlessly in this release.

IPPSFB-2080

phone becoming 'stuck’ and may require a reboot.

IPPSFB-7169 [445HD Wi-Fi] Wi-Fi phone screens are currently available only in English.

IPPSFB-7135 [445HD Wi-Fi] When Wi-Fi is in use, BToE automatic pairing is not supported.

IPPSFB-6815 [445HD Wi-Fi] Switching between a wired and a Wi-Fi connection requires a phone reboot.

IPPSFB-8152 [C450HD, 445HD] [Wi-Fi] Provisioning using TFTP may fail due to timeout.

IPPSFB-8477 [445HD/C450HD] QoE report modifications related to signal level are incorrect.

106161

[Boss-Admin] A user whose name starts with a small letter and who is configured as Admin, is displayed on the Boss' phone as a URI address rather than with the display name.

106517

[Multiple 440HD Boss-Admin] When there is a crossed delegation, i.e., when Admin 1 is Boss of Admin 2 and Admin 2 is Boss of Admin 1), the Boss doesn't see the call when Admin answers the call.

106254

[Multiple 440HD Boss-Admin] If the call is not parked, there is no issue.

105852

[BToE] In the scenarios listed below, the phone performs as a PC playback device and not as a standalone phone. Some call management capabilities consequently go missing, e.g., hold,

call, i.e., the phone is used as the PC playback device. Example scenarios:

 RGS/Delegate call made ‘on behalf’ from the PC client  Call from IM (Instance Message) that was opened before the phone was paired.

This is aligned with Microsoft's BToE implementation.

106432

[BToE with Delegation] When a video call comes in to the Boss, a paired Admin phone will not ring but can accept the call. This is aligned with Microsoft's BToE implementation of video calls.

104326

['Favorites'] The phone does not retrieve Outlook contacts from onservers.

103639

[Multi-Party Remote Conferencing] When a conference is locked, the phone cannot add a user (Teams client or other certified phone) if not admitted within 15 seconds.

103927 Sometimes, the user is unable to join a Teams Meeting whose configured 'End time' has passed.

- [BToE] BToE does not function if PC users are switched without logging off first.

[BToE - PC application] Windows 10 users who have the BToE PC application already installed on their PCs must uninstall it before installing the new version of the application.

104040

[BToE] When a paired user answers an incoming team-call, the phone does not present the call as a team-call.

Version 3.4.4 30 Document #: LTRT-08492

+ 70 hidden pages

AudioCodes 445HD, 450HD, C450HD User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

List of Tables

Notice

WEEE EU Directive

Customer Support

Stay in the Loop with AudioCodes

Abbreviations and Conventions

Related Documentation

Documentation Feedback

1 Introduction

1.1 Overview

1.1.1 About the RX50 Conference Phone

1.1.2 Differentiating RX50 from AudioCodes’ Other Phone Models

1.1.3 About AudioCodes’ 400HD Series of Teams-Compatible IP Phones

1.2 400HD Series IP Phones Specifications

1.3 Supported Models

2 Version 3.4.4

2.1.1 What’s New in Version 3.4.4

2.1.2 Known Constraints in Version 3.4.4

2.1.3 Resolved Constraints in Version 3.4.4

3 Previous Releases

3.1 Version 3.4.4.1000.10

3.1.1 What’s New in Version 3.4.4.1000.10

3.1.2 Known Constraints in Version 3.4.4.1000.10