Grandstream GVC3200 Administration Guide - Manual (Page 35)

Firmware Version 1.0.1.5 GVC3200 Administration Guide Page 34 of 61
Use Actual
Ephemeral Port in
Contact with
TCP/TLS It is used to set the port information in the Via header and Contact header of SIP
message when the GVC3200 system use TCP or TLS. If set to No, these port
numbers will use the permanent listening port on the phone. Otherwise, they will use
the ephemeral port for the particular connection. The default setting is "No".
Symmetric RTP
It is used to set if the GVC3200 system enables the symmetric RTP mechanism. If it
is set to “Yes”, the GVC3200 system will use the same socket/port for sending and
receiving the RTP messages. The default setting is "No".
Support SIP
Instance ID
It is used to set if the GVC3200 system 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. The default setting is "Yes".
Validate Incoming
SIP Messages
It is used to set if the GVC3200 system will check the incoming SIP messages caller
ID and CSeq headers. If the message does not include the headers, it will be
rejected. The default setting is "No".
Check SIP User ID
for Incoming
INVITE
It is used to set if the GVC3200 system will check the SIP User ID in the Request
URI of the SIP INVITE message from the remote party. If it doesn't match the
phone's SIP User ID, the call will be rejected. If set to “Yes”, this feature will be
active. The default setting is “No”.
Authenticate
Incoming INVITE
It is used to set if the GVC3200 system will authenticate the SIP INVITE message
from the remote party. If set to "Yes", the phone will challenge the incoming INVITE
for authentication with SIP 401 Unauthorized response. The default setting is "No".
SIP Realm Used
for Challenge
INVITE & NOTIFY
It is used to configure to verify incoming INVITE, it only takes effect when the
incoming INVITE is enabled. It is used to verify provision NOTIFY information,
including check-sync, re-sync and reboot, but only effective when SIP authentication
is enabled.
Only Accept SIP
Requests from
Known Servers
It is used to set if the GVC3200 system will answer the SIP request from saved
servers/ If set to “Yes”, only the SIP requests from saved servers will be accepted;
and the SIP requests from the unregistered server will be rejected. The default
setting is “No”.
SIP T1 Timeout
It is used to define an estimate of the round trip time of transactions between a client
and server. If no response is received in T1, the figure will increased 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 second.
SIP T2 Timeout
It is used to define 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 second.
Remove OBP from
Route
It is used to set if the GVC3200 system will remove 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".