3Com VCX V7122 SIP User Manual page 83

SIP Configuration Parameters
Table 19
INI File Field Name
*
GUI Parameter Name
Prefix
IsUseFreeChannel
EnableEarlyMedia
(Enable Early Media)
IsPrackRequired
(Enable PRACK)
SipSessionExpires
(Session-Expires Time)
EnableRPIheader
EnableTransfer
(Enable Transfer)
EnableHold
(Enable Hold)
3Com VCX V7122/SIP VoIP Gateway User Manual
Valid Range and Description
Mapping phone number to IP address, using phone number prefix
Example: Prefix = 20,10.2.10.2
Any dialed number that starts with 20 is routed to IP address 10.2.10.2.
Needed when a proxy is not used.
Can appear up to 20 times.
The maximum Prefix size is seven digits.
It is possible to configure Prefix = *,<IP address>. In this case all calls are
sent to defined the IP address.
Note, that if Prefix table is not empty, the parameter
Prefix= *,<IP address> should be the last one in the list.
0 = Select the B channel according to destination phone number received
in H225 setup message, (used only for bulk load testing)
1 = Select the next available B channel (default)
Should be set to 1 for VCX V7122/SIP Gateways.
0 = Early Media is disabled (default)
1 = Enable Early Media
If enabled, the VCX V7165 Digital Media Server sends 183 Session
Progress response (instead of 180 ringing), allowing the setup of the
media stream prior to the answering of the call.
0 = PRACK is not used (default)
1 = PRACK is used by Gateway
0 = Not activate (default)
Timeout [seconds] for Keeping a re-INVITE message alive within a SIP
session
0 = Disable (default)
1 = RPI header is generated in SIP INVITE message for both called and
calling numbers
0 = Call transfer is not allowed
1 = The Gateway responds to a Re-INVITE message with Referred To
header to initiates a Call Transfer
0 = Hold service disabled (default)
1 = Hold service is enabled, held tone is played to holding party
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