Grandstream Networks GRP261 Series Administration Manual page 29

Local SIP Port
SIP URI Scheme When Using TLS
Use Actual Ephemeral Port in
Contact with TCP/TLS
Support SIP Instance ID
SIP T1 Timeout
SIP T2 Timeout
Outbound Proxy Mode
Enable 100rel
Use Route Set In NOTIFY (Follow RFC
6665)
Session Timer
Enable Session Timer
Session Expiration
● Dual (BLF Enforced): will try to enforce BLF subscriptions to use TCP
protocol by adding 'transport=tcp' to the Contact header.
The default setting is "Transport Only".
Defines the local SIP port used to listen and transmit. The default value is
5060 for Account 1, 5062 for Account 2, 5064 for Account 3, 5066 for Account
4, 5068 for Account 5, 5070 for Account 6. The valid range is from 1 to 65535.
Specifies if "sip" or "sips" will be used when TLS/TCP is selected for SIP
Transport. The default setting is "sips".
This option is used to control the port information in the Via header and
Contact header. 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
connection
The default setting is "No".
Defines whether SIP Instance ID is supported or not. Default setting is "Yes".
SIP T1 Timeout is an estimate of the round-trip time of transactions between a
client and server. If no response is received the timeout is increased, and
request re-transmit retries would continue until a maximum amount of time
define by T2. The default setting is 0.5 seconds.
SIP T2 Timeout is the maximum retransmit time of any SIP request messages
(excluding the INVITE message). The re-transmitting and doubling of T1
continues until it reaches the T2 value. Default is 4 seconds.
The Outbound proxy mode is placed in the route header when sending SIP
messages, or they can be always sent to outbound proxy.
● In route
● Not in route
● Always send to
Default is "in route".
The use of the PRACK (Provisional Acknowledgment) method enables
reliability to SIP provisional responses (1xx series). This is very important to
support PSTN internetworking. To invoke a reliable provisional response, the
100rel tag is appended to the value of the required header of the initial
signaling messages. The default setting is "No"
Configures whether to use route set in NOTIFY (follow RFC 6665). If enabled,
the Request URI of the refresh subscription will use the URI in the received
NOTIFY Contact (RFC 6665); otherwise, the URI in the previously subscribed
200 OK Contact will be used. The default setting is "Yes".
This option is used to enable or disable session timer on the phone side when
server side can provide both session timer UPDATE or session audit UPDATE.
The default setting is "No".
The SIP Session Timer extension (in seconds) that 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.