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View SIP Channel Profile

At the directory tree, expand the Channel Profile Tables. Select the Default SIP profile .

Modify SIP Channel Profile

Either double-click on a line in the Channel Profile Table for a SIP type, or highlight a line and use the Edit... popup menu option to access the dialog box for a line in this table.
Note that you can also configure the SIP timer. See FRC3261 for recommended values.

Edit Default SIP Channel Profile Table Entries Dialog

Field

Description

Interdigit Timeout

The time to wait between digits before timing out.
Default: 500 ms

Voice Prompt Table

Select a table to use for MLPP voice prompts.

Service Tones

When this is enabled VX will play inband ringback and other service tone.

Preemption Tones

Whether the channel should play preemption tones when clearing, or just clear the call.

Prefer Inband Ringback (RFC3960)

Generate local ringback until RTP packets are received from the peer device.
This means that VX will generate local ringback until a ringback (RTP) stream is received from the other device.

Stop T310 on Trying

When enabled, sends an ISDN Progress message upon receipt of a SIP TRYING. Receipt of a Progress message will prevent the ISDN peer from expiring its T310 timer. Enabling this feature may prevent the ISDN peer from sending a DISCONNECT during a long SIP call setup.

Exclude NOTIFY from Allow header

When set to Yes, VX will Exclude NOTIFY message in Allow header of Outgoing messages.

Exclude OPTIONS from Allow header

When set to Yes, VX will Exclude OPTIONS message in Allow header of Outgoing messages.

Exclude PRACK from Allow header

When set to Yes, VX will Exclude PRACK message in Allow header of Outgoing messages.

Exclude REFER from Allow header

When set to Yes, VX will Exclude REFER message in Allow header of Outgoing messages.

Exclude SUBSCRIBE from Allow header

When set to Yes, VX will Exclude SUBSCRIBE message in Allow header of Outgoing messages.

Exclude UPDATE from Allow header

When set to Yes, VX will Exclude UPDATE message in Allow header of Outgoing messages.

Bit Debounce Time

Set the time in ms that bits must remain stable before they are processed (0=default).

SIP T1, T2, T4, TD

Configuration of RFC 3261 retransmission timer.

100 Trying timeout

VX will hold the ISDN to Lync call up for the time specified when the Mediation Server only replies to the INVITE from the VX with 100 Trying messages. Valid timeout range: 30 to 300 seconds; default: 198 seconds.