Nortel Networks SRG50 - Manual (Page 73)

Chapter 6 Setting up the private VoIP network 73
SRG50 Configuration Guide
Gatekeeper routing
The gatekeeper routes the calls based on an internal numbering table. Ensure that the gatekeeper
administrator has a list of the numbers that identify the SRG and the SRG PSTN.
Examples:
• If the system is running with a CDP dialing plan and the SRG DN range is from 3000
to 3199, the gatekeeper requires this information to establish that calls starting with 30
and 31 are routed to the SRG.
• If the PSTN to which the SRG connects has a location code of 521, the gatekeeper
must have a record of this code in the SRG list so that main office calls to the SRG
PSTN can be routed correctly.
If you require H323 trunks, you must select the Gatekeeper wildcard check box in the H323
settings. If you do not select the Gatekeeper wildcard check box, then calls are SIP routed (default
setting).
When you select the Gatekeeper wildcard check box, all dialed digits match gatekeeper digits and
VoIP calls are routed through the gatekeeper.
For detailed information about H323 gatekeeper and SIP proxy, see the Networking Configuration
Guide (NN40020-603).
To configure gatekeeper settings for H323 trunks
1 Access the IP Trunks configuration panel in Element Manager (Configuration > Resources >
Telephony Resources > Modules panel > Module type column) select IP Trunks.
2 On the Details for Module panel, select the H323 Settings tab.
3 On the Configuration subpanel, click Modify.
4 From the Call signaling list, select Gatekeeper Resolved or Gatekeeper Routed.
5 In the Primary Gatekeeper IP field, enter the IP address for the Primary Network Routing
Services Address*
6 In the Backup Gatekeeper(s) field, enter the IP address for Alternate Network Routing
Services Address
7 In the Alias names field, enter Name: followed by the H.323 ID of the SRG (for naming
conventions, see the Networking Configuration Guide (NN40020-603)).
8 Click Ok.
9 On the Telephony Setting subpanel, from the MCDN protocol list, select CSE.
10 On the Telephony Settings subpanel, select the Gatekeeper wildcard check box.
SIP configuration
Access the IP Trunks configuration panel in Element Manager to configure the SIP trunks
(Configuration > Resources > Telephony Resources > Modules panel > Module type column > IP
Trunks, then select the SIP Settings tab).