3Com VCX V7122 SIP User Manual page 79

SIP Configuration Parameters
Table 19
INI File Field Name
*
GUI Parameter Name
SipT2Rtx
(SIP T2 Retransmission
Timer [ms])
TrunkGroup_x
(Trunk Group table)
PSTNPrefix
(IP to Trunk Group Routing
table)
RemovePrefix
3Com VCX V7122/SIP VoIP Gateway User Manual
Valid Range and Description
Timer T2 value for retransmission in ms
SipT2Rtx = 4000
TrunkGroup_x=T/a-b,c
x = Trunk group ID (1 – 99)
T = Physical Trunk (0 – 7)
a = Starting B-channel (from 1)
b = Ending B-channel (up to 31)
c = phone number allocated with the first channel (optional)
For example:
TrunkGroup_1 = 0/1-31,1000 (for E1 span)
TrunkGroup_1 = 1/1-31,2000
TrunkGroup_2 = 2/1-24,3000 (for T1 span)
Trunk group is an optional parameter, it is still possible to use the
ChannelList parameter to define enabled B-channels as a single group.
PSTNPrefix = a, b
a = Destination number prefix (for IP Tel calls)
b = Trunk group ID
Outgoing IP Tel calls starting with the prefix a are routed to Trunk group
number b
0 = Do not remove prefix (default)
1 = Remove PSTN prefix (defined in the routing table) from a telephone
number of an incoming IP call, before forwarding it to PSTN
Applicable only if number manipulation is performed after call routing for
IP Tel calls (RouteModeIP2Tel = 0).
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