Configuring Early Call Connect / Disconnect (Optional); Configuring A Phone Context (Optional) - Patton electronics SmartWare R.3.20 Software Configuration Manual

SmartWare Software Configuration Guide
node(if-sip)[MySipIf]#use profile voip myprofile
Configuring early call connect / disconnect (optional)
Normally, SIP calls are fully connected by sending a 200 OK response to the INVITE request, if the called
party answers the call. Any call progress tones or announcements are transmitted in the early SIP dialog. There
are however several SIP user agents, which do not support media to be transmitted or received in an early dia-
log. To solve this problem, it is possible to connect the SIP call using a 200 OK response to the initial INVITE
request as soon as in-band information is available. This will allow any SIP user agent to receive pre-call in-
band information.
Early call disconnect suppresses busy tones (e.g. disturbing a telephone conference) and post-call announce-
ments by sending a BYE message to the remote SIP user agent when the connected terminal hangs up (ISDN:
when Disconnect message is received; analog line: when busy tone is detected, loop current is interrupted, or
battery voltage is reversed).
Procedure: To enable early call connect and early call disconnect
Mode: Interface SIP
Step
1 node (if-sip)[ if-name ]#early-connect
2 node (if-sip)[ if-name ]#early-disconnect
Example: Enable early call connect and early call disconnect
The following example shows how to enable early call disconnect on a SIP interface named MySipIf.
node>enable
node#configure
node(cfg)#context cs
node(ctx-cs)[switch]#interface sip MySipIf
node(if-sip)[MySipIf]#early-connect
node(if-sip)[MySipIf]#early-disconnect
Configuring a phone context (optional)
The SIP gateway automatically adds a user=phone tag to each SIP URI within INVITE requests, which contain
a phone number in international format in their user part. Phone numbers in international format are num-
bers starting with a plus (+) sign. If the user part however contains a different type of phone number, the
user=phone parameter will not be added automatically. This is because the user=phone option must not be
appended to a SIP URI containing other than international numbers in their user part, unless a phone-context
parameter is also appended to the SIP URI. Therefore, you can specify here the name of a phone context, to be
included together with the user=phone parameter in any SIP URI sent within INVITE messages, which con-
tain other than international format phone numbers in their user part.
SIP interface configuration task list
Command
32 • SIP interface configuration
Purpose
Enables early call connect (Default: disabled)
Enables early call disconnect (Default: dis-
abled)
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