WELLTECH WellGate 2540, User Manual

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CH5 VOIP Advance
5-1 SIP
Figure 5-1 SIP
Parameter Description:

SIP Hold Type: SIP on hold message sending method.
-
Send Only: Set the SDP media to sendonly when send an on-hold
SIP message.
-
0.0.0.0: Set the SDP connection to 0.0.0.0 when send an on-hold
SIP message.
-
Inactive: Set the SDP media to inactive when send an on-hold SIP
message.

SIP Compact Form: Enable SIP compact form or not. When enable
this feature, the connected SIP proxy is required to support compact
form.

Session Refresher: Who will send dialog keep alive message
(re-invite or update).
-
UAC: User Agent Client will do the refresh (default setting)
-
UAS: User Agent Server will do the refresh

SIP T1 (msec): T1 determines several timers as defined in
RFC3261. For example, when an unreliable transport protocol is
used, a Client Invite transaction retransmits requests at an interval
that start at T1 seconds and doubles after every retransmission. A
Client General transaction retransmits requests at an interval that
starts at T1 and doubles until it reaches T2. (Default Value: 500ms)
**