Grandstream Networks GSC35 Series User Manual page 40

Use Actual Ephemeral
Port in Contact with
TCP/TLS
Support SIP Instance ID
SIP T1 Timeout
SIP T2 Interval
SIP Timer D Interval
Remove OBP from
Route
Enable 100rel
Session Timer
Enable Session Timer
Session Expiration (s)
Determines the port information in the Via header and Contact header of
SIP message when the device use TCP or TLS. If set to No, these port
numbers will use the permanent listening port on the device. Otherwise,
they will use the ephemeral port for the particular connection. The default
setting is "No".
Determines if the device will send SIP Instance ID. The SIP instance ID is
used to uniquely identify the device. If set to "Yes", the SIP Register
message Contact header will include +sip.instance tag. Default is "Yes".
Defines an estimate of the round-trip time of transactions between a client
and server. If no response is received in T1, the figure will increase to 2*T1
and then 4*T1. The request re-transmit retries would continue until a
maximum amount of time define by T2. The default setting is 0.5 sec.
Specifies the maximum retransmit time of any SIP request messages
(excluding the SIP INVITE message). The re-transmitting and doubling of
T1 continues until it reaches the T2 value. The default setting is 4 sec.
Defines the amount of time that the server transaction can remain when
unreliable response (3xx-6xx) received. The valid value is 0-64 seconds.
The default value is 0.
Configures the device to remove the outbound proxy URI from the Route
header. This is used for the SIP Extension to notify the SIP server that the
device is behind a NAT/Firewall. If it is set to "Yes", it will remove the Route
header from SIP requests. The default setting is "No".
Actives PRACK (Provisional Acknowledgment) method. PRACK improves
the network reliability by adding an acknowledgement system to the
provisional Responses (1xx). It is set to "Yes", the device will response to
the 1xx response from the remote party. Default is "No".
Allows the device to use the session timer, when set to "Yes", it will be
added in the SIP INVITE message to notify the server.
Configures the device's SIP session timer. It enables SIP sessions to be
periodically "refreshed" via a SIP request (UPDATE, or re-INVITE). If there
is no refresh via an UPDATE or re-INVITE message, the session will be
terminated once the session interval expires. Session Expiration is the time
(in seconds) where the session is considered timed out, provided no
successful session refresh transaction occurs beforehand.
The default setting is 180. The valid range is from 90 to 64800.
GSC35XX Series User Manual
Version 1.0.0.15
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