Trunk To Trunk Routing Example - 3Com VCX V7122 User Manual

Field Name
RTPdelay
RTPjitter
RTPssrc
RemoteRTPssrc
RedirectReason
TON
NPI
RedirectPhonNum

Trunk to Trunk Routing Example

This example describes two VCX V7122 gateways, each interface with the PSTN through
four E1 spans. Gateway "A" is configured to route all incoming Tel IP calls to gateway "B".
Gateway "B" generates calls to PSTN on the same E1 Trunk as the call was originally
received (in gateway "A").
Gateway "A" IP address is 192.168.3.50.
Gateway "B" IP address is 192.168.3.51.
Ini File Parameters of Gateways "A" and "B":
Define, for both gateways, four trunk groups; each with 30 B-channels:
TrunkGroup_1 = 0/1-31,1000
TrunkGroup_2 = 1/1-31,2000
TrunkGroup_3 = 2/1-31,3000
TrunkGroup_4 = 3/1-31,4000
In gateway "A", add the originating Trunk Group ID, as a prefix, to the destination
number, for Tel IP calls:
AddTrunkGroupAsPrefix=1
In gateway "A", route all incoming PSTN calls, starting with the prefixes 1, 2, 3 and 4, to
gateway's "B" IP address:
Prefix = 1, 192.168.3.51
Prefix = 2, 192.168.3.51
Prefix = 3, 192.168.3.51
Prefix = 4, 192.168.3.51
Note: It is also possible to define "Prefix = *,192.168.3.51" instead of the four lines
above.
In gateway "B", route IP PSTN calls to Trunk Group ID according to the first digit of the
called number:
156
Description
RTP Delay
RTP Jitter
Local RTP SSRC
Remote RTP SSRC
Redirect Reason
Redirection Phone Number Type
Redirection Phone Number Plan
Redirection Phone Number
3Com VCX V7122 SIP VoIP Gateway User Manual