ZyXEL ISG50-ISDN, ISG50-PSTN Application Note

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ISG50-ISDN

ISG50-PSTN

Application Note

Version 2.0

June, 2012

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Table of Contents

1. How to Quickly Prepare Communication Infrastructure in a New Small Business? ..................................................................................... 5

Initial Setup .................................................................................................................................................................................................. 5

Create Extensions ................................................................................................................................................................................. 5

How to configure call forwarding for each extension? ................................................................................................................. 10

How to receive and check the voice mail? .................................................................................................................................... 12

Firewall Setting ................................................................................................................................................................................... 14

QoS ..................................................................................................................................................................................................... 15

2. How to Manage Extensions as Business Needs Grow? .............................................................................................................................. 16

Auto Provision ............................................................................................................................................................................................ 16

SIP Server/SIP account/Password ........................................................................................................................................................ 17

Phone book ........................................................................................................................................................................................ 19

Feature Key ......................................................................................................................................................................................... 20

Firmware Upgrade .............................................................................................................................................................................. 22

3. How to Develop a Non-stop Voice Service? ............................................................................................................................................... 27

WAN failover .............................................................................................................................................................................................. 27

VoIP survivability ........................................................................................................................................................................................ 30

DDNS .......................................................................................................................................................................................................... 31

4. How to Expand the Current Networking Infrastructure to Fulfill Multi-site Requirements? ...................................................................... 33

Work with ZyWALL USG products ............................................................................................................................................................... 33

Trusted Peer & SIP trunk ............................................................................................................................................................................. 43

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5. How to Secure the Communication? ......................................................................................................................................................... 55

Site to site IPsec VPN .................................................................................................................................................................................. 56

Trusted Peer over IPsec VPN ....................................................................................................................................................................... 78

Brute-force Attack Protection ..................................................................................................................................................................... 79

6. How to Establish a Seamless Mobile Office with ZyXEL Reach? ................................................................................................................. 82

ZyXEL Reach – Smartphone Application ...................................................................................................................................................... 82

How to avoid missing any call on a certain extension? ........................................................................................................................ 88

Mobile Extension ........................................................................................................................................................................................ 90

7. How to Leverage Enterprise-class Calling Features to Increase Business Productivity? ............................................................................. 93

Auto Attendant ........................................................................................................................................................................................... 93

Hunt Group .............................................................................................................................................................................................. 100

Three-way Conference .............................................................................................................................................................................. 102

How to perform a three-way conference on ZyXEL Reach? ................................................................................................................ 103

How to perform three-way conference on V310?.............................................................................................................................. 105

Meet-Me Conference ............................................................................................................................................................................... 107

System Sound ........................................................................................................................................................................................... 108

How to change the language of system sounds from English to a specific language? ........................................................................ 108

8. How to Record a Call? .............................................................................................................................................................................. 111

Preparation for Call Recording .................................................................................................................................................................. 111

License .............................................................................................................................................................................................. 111

USB Storage ...................................................................................................................................................................................... 112

How to record calls on a certain trunk or an extension? ........................................................................................................................... 113

Full-time Recording ........................................................................................................................................................................... 113

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On-demand Recording ...................................................................................................................................................................... 114

Query Call Recording Files ........................................................................................................................................................................ 115

9. How to Audit Call Usage with Report and Analyzer to Improve Working Efficiency? .............................................................................. 117

CDR .......................................................................................................................................................................................................... 117

How to find the call history? ............................................................................................................................................................. 118

How to check QoS of each call in RTCP? ............................................................................................................................................ 120

Back up CDR file ....................................................................................................................................................................................... 122

10. How do UC Server and UC Client Work with ISG50? ................................................................................................................................ 123

Preparation for TAPI Service ..................................................................................................................................................................... 124

TAPI Driver Installation ............................................................................................................................................................................. 126

UC Server Installation ............................................................................................................................................................................... 129

UC Client Installation ................................................................................................................................................................................ 139

Presence ........................................................................................................................................................................................... 147

Make a call ........................................................................................................................................................................................ 148

Hang up a call ................................................................................................................................................................................... 150

Reject a call ....................................................................................................................................................................................... 150

Blind Transfer .................................................................................................................................................................................... 151

Consultant Transfer ........................................................................................................................................................................... 152

Redirect a call ................................................................................................................................................................................... 153

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1. How to Quickly Prepare Communication Infrastructure in a New Small Business?

Initial Setup

A network administrator plans to deploy an ISG50 for VoIP services in a new small company. First, it is necessary to prepare extension numbers,
as well as enable voicemail and call forwarding for the current employees in the Sales and Marketing departments. In order to allow road
warriors to register with the ISG50 using their smart phones during business trips, the network administrator needs to define the firewall rules
since the ISG50 works as an all-in-one gateway.

Create Extensions

Goal to achieve: Create two authority groups for Marketing department and Sales department, and add 5 extensions in Marketing department.
Condition:

Authority Group: Marketing and Sales

Extensions for Marketing: 3100-3104

Pin Code for Marketing: 3100-3104; Password for Marketing: 53100-53104

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First, add authority groups for departments.

Create two authority groups and fill in “Marketing” and “Sales” as the authority group names.

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You can either add SIP peers one by one or add multiple SIP peers at a
time.
Here, we add multiple SIP peers.

Define the start number and the amount of extensions.
Here, we set 3100 as the start number.
The passwords for these SIP peers are the same as the extension
numbers. In order to make the password more secure, we add a
prefix number to these extensions.

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Extensions have been created.
Double click the extension number to check and modify the setting
of the extension.

For security reasons, you can modify the Web/VM PIN code and the
password for each extension.

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How to configure call forwarding for each extension?

Goal to achieve: Configure call forwarding for extension 1006.
Condition:

Extension 1006

Double click the extension in the Authority Group list to configure call forwarding and call blocking rules for this extension.

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Examples:

DND (Do Not Disturb): When DND is enabled on #1006 and a caller tries to reach this extension, he will hear a voice prompt that the extension
is not available. The extensions configured in the “White List” can still reach #1006.
Blind Forward: When Blind Forward is enabled on #1006, every caller who tries to dial #1006 will be redirected to a pre-configured extension
or voice mail.
Busy Forward: If a caller dials #1006 while #1006 has a phone call with someone, the caller will be redirected to a pre-configured extension or
voice mail when Busy Forward is enabled. The definition of “Busy” is that “Call Waiting” is disabled.
No Answer Forward: A caller dials #1006 but #1006 doesn’t answer the phone. This caller will be redirected to a pre-configured extension or
voice mail when the ring time of #1006 exceeds the value of Default Ring Time. The default ring time is 20 seconds. You can change the value of
default ring time in CONFIGURATION > PBX > Global > SIP Server > Default Ring Time.
After Office Hours: If the incoming call is not during the office hours, you can allow the incoming call to be forwarded to a specific extension
number or voice mail.

Black List: A caller’s number is on the Black List of #1006. When this caller dials #1006, he will hear the disconnect tone.
Block the calls without Caller ID: You can block the incoming calls which are without call ID.

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How to receive and check the voice mail?

Goal to achieve: Extension 1006 would like to receive voicemail notification with the voice file in the email box.
Condition: Extension 1006

Go to CONFIGURATION > PBX > Global > E-Mail to fill in the mail server information and email account.

Specify the email address that you want to receive voice mail notifications of your extension.

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If “Attached Voice File” is selected, you can listen to the voice message by downloading the attached file in the notification mail.

If the voice message is not attached in the notification mail, you can dial the feature code and the extension number to hear the voice message.
The default feature code is **. In this example, you can dial **1006 to hear the voice mail of extension 1006.

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Firewall Setting

Goal to achieve: The administrator allows SIP clients to register from the WAN interface.
Condition:

Activate the firewall rule: PBX_SERVICE
Enable Firewall: checked

By default, ISG50 doesn't allow SIP clients to register from the WAN interface. You have to activate the first firewall rule “PBX_SERVICE” to let
SIP clients register from the WAN interface.

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QoS

Goal to achieve: The administrator would like to let VoIP service has the highest priority over other traffic.
Condition:

Enable Highest Bandwidth Priority for PBX Traffic: checked

Check this box to ensure VoIP traffic receives the highest priority.

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2. How to Manage Extensions as Business Needs Grow?

The new company recruits more employees in the following weeks and the network administrator would like to quickly deploy phone services
for the new employees at their desks. The auto-provisioning feature allows administrators to configure VoIP related settings on the V310/snom
SIP clients from a central location. A configuration file associated with the SIP extension on the ISG50 can be configured and maintained.
Auto-provisioning allows the V310/snom phones to periodically download the configuration file from the ISG50, such as SIP account
authentication, phonebook, feature keys and the phone’s firmware URL.

Auto Provision

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SIP Server/SIP account/Password

Goal to achieve: Configure SIP accounts on snom and V310 directly from ISG50.
Condition:

V310

Snom

Extension: 1005

Extension: 1007

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Fill in the MAC address of the IP phone and select the model name from the product list that receives configuration settings from the ISG50 for
this extension.

Snom

V310

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Phone book

Goal to achieve: Download the phonebook on snom and V310 from ISG50.
Condition:

Extension number: 1005-1012; 2000-2001

Snom

V310

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Feature Key

Goal to achieve: Download the feature keys on snom from ISG50.
Condition:

Feature keys: Agent Login; Agent Pause; Voicemail; Group Pickup; Call Transfer; Mobile Extension On; Mobile Extension Off; Mobile Extension
Auto; Call Recording on Demand; Followme On; Followme Off; Line

Configure the feature key settings for the Snom 370 connected to the ISG50. Feature keys cannot be provisioned to V310.

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The setting of feature keys is downloaded from ISG50. Here, key P[k] of ISG50 is mapped to key P[k+1] of Snom phone. (k is from 0 to 11)

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Firmware Upgrade

Goal to achieve: Get the firmware upgrade through the auto provision from the URL configured in ISG50.
Condition:

Firmware URL:

Snom

http://59.124.163.151/FW/snom370-8.4.32-SIP-f.bin

V310

http://10.59.1.37/V310_1.00AABT.0B5

Snom

Configure firmware upgrade URLs for the Snom 370.
Visit http://wiki.snom.com/Firmware to find the latest firmware version.
You can either fill in the firmware download link (http://provisioning.snom.com/download/fw/snom370-8.4.32-SIP-f.bin) or put the firmware
on another web server.

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Please note that snom phones only support HTTP firmware update, so the URL link must be in the format of http://IP_address/FW_version.bin

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You can log into the GUI of Snom 370 to check if the firmware has been upgraded to target version.

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V310
Fill in the firmware download URL.

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V310 will receive the firmware upgrade path through auto provision. Blanks in “Auto Configuration” and “Firmware Upgrade” tabs will be
automatically filled with an HTTP IP address.

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3. How to Develop a Non-stop Voice Service?

The interruption of non-stop voice service is often a concern of the employees because interrupted service may cause the company to suffer
from business losses and a bad reputation. With the dual WAN design of the ISG50, the company can connect up to two ISPs via Ethernet or
PPPoE connections to avoid VoIP service breakdowns. In addition, the ISG50 not only offers voice services through the ITSP by a SIP trunk, but
also via a PSTN/ISDN connection to ensure continuous voice services. Furthermore, in case where the WAN IP address is dynamic, the SIP
server address can be automatically updated with the DDNS function so that the mobile clients can register with the ISG50 using the domain
name.

WAN failover

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Goal to achieve:
VoIP traffic goes out primarily through WAN1. In case WAN1 is down, it will go out via WAN2.

Condition:

Primary: WAN1; Backup: WAN2

Add WAN trunk for VoIP traffic - Set WAN1 as Active mode, and set WAN2 as Passive mode.
Configuration > Network > Interface > Trunk > User Configuration > Add

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Apply this new trunk in Default Trunk Selection for System Service Traffic.

Use SYSTEM_DEFAULT_WAN_TRUNK to do load balancing for data traffic.

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VoIP survivability

Goal to achieve: If the connection from ISTP is lost, clients can still make calls through BRI trunk.
Condition:

For international calls,

Primary trunk: SIP trunk; Secondary trunk: BRI trunk

In the LCR, move multiple outbound line groups to the Selected column for making calls out.
Use the Up and Down buttons to specify the priority of the outbound line groups.
In this example, for the LCR “international_call”, select SIP trunk (Trunk1) as the first priority outbound line and BRI trunk (BRI_1) as the
secondary outbound line.