Grandstream Networks GXV3350 Administration Manual page 22

Determines which network protocol will be used to transport the SIP message. It can be selected from
SIP TCP/UDP/TLS.
Transport
Default setting is "UDP".
Determines the local SIP port used to listen and transmit.
Local SIP
The default setting is 5060 for Account 1, 5062 for Account 2, 5064 for Account 3, 5066 for Account 4, 5068
Port
for Account 5, and 5070 for Account 6. The valid range is from 5 to 65535.
SIP URI
Defines which SIP header, "sip" or "sips", will be used if TLS is selected for SIP Transport. T
Scheme
When
The default setting is "sip".
Using TLS
Use Actual
Ephemeral
Determines the port information in the Via header and Contact header of SIP message when the phone
Port in
system use TCP or TLS. If set to No, these port numbers will use the permanent listening port on the phone.
Contact
Otherwise, they will use the ephemeral port for the particular connection. The default setting is "No".
with
TCP/TLS
Determines if the phone system will send SIP Instance ID. The SIP instance ID is used to uniquely identify the
Support
device. If set to "Yes", the SIP Register message Contact header will include +sip.instance tag.
SIP
Instance ID
The default setting is "Yes".
Defines an estimate of the round-trip time of transactions between a client and server. If no response is
SIP T1
received in T1, the figure will increase to 2*T1 and then 4*T1. The request re-transmit retries would continue
Timeout
until a maximum amount of time define by T2. The default setting is 0.5 sec.
SIP T2 Specifies the maximum retransmit time of any SIP request messages (excluding the SIP INVITE message). The
Interval 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)
SIP Timer received. The valid value is 0-64 seconds.
D Interval
The default value is 0.
Configures the phone system to remove the outbound proxy URI from the Route header. This is used for the
Remove
SIP Extension to notify the SIP server that the device is behind a NAT/Firewall. If it is set to "Yes", it will
OBP from remove the Route header from SIP requests.
Route
The default setting is "No".
Use route Configures whether to use route set in NOTIFY (follow RFC 6665). If enabled, the Request URI of the
set in refresh/cancel subscription will use the URI in the received NOTIFY Contact (RFC 6665); otherwise, the URI in
NOTIFY the previously subscribed 200 OK Contact will be used.
Actives PRACK (Provisional Acknowledgment) method. PRACK improves the network reliability by adding an
Enable
acknowledgement system to the provisional Responses (1xx). It is set to "Yes", the phone system will
100rel
response to the 1xx response from the remote party. The default setting is "No".
Session
Timer