AltiGen MAXCS 7.5 Softswitch Deployment Guide - Manual (Page 24)

Page 24 of 37 MAXCS 7.5 All-Software Solution Deployment Guide
6. In Enterprise Manager, add the SIP Trunk service provider’s IP address to the IP Device Range (on
the Servers > IP codec tab) and select the proper codec profile for this service. Failure to do this step
may result in no audio, even if the SIP Trunk channel shows the call is connected.
Step 11: Configure SIP Trunk Groups
You can configure trunk groups so that SIP devices can exchange their status. By sending a “keepalive”
message and checking for a valid response, SIP devices will know whether remote peers are ready to receive
a new request.
Once the MaxCS server has been set up, SIP trunks will try to register to the SIP servers first. If the registration
is successful and if the SIP Options feature is enabled, MaxCS will send the “keepalive” message to SIP
providers according the interval setting. Only one “keepalive” message will be sent for each group of trunks.
1. In the SIP Trunk Configuration dialog box, click Trunk Group Configuration.
2. In the SIP Trunk Group Configuration window, select a SIP Server on the left, and then configure SIP
Options for that SIP Trunk group as appropriate.
The window includes SIP provider IP address, SIP trunk List, and SIP Options settings. SIP trunks are
grouped by SIP provider IP address; SIP trunks with the same SIP Server IP address are treated as a
group.