Table of Contents
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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
2
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