User Guide

GRP26XX Administration Guide
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OPTIONS Keep Alive
Max Lost
Number of max lost packets for OPTIONS Keep Alive feature before the
phone re-registration.
Local SIP Port
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.
SIP Registration Failure
Retry Wait Time
Specifies the interval to retry registration if the process is failed. The valid
range is 1 to 3600. The default value is 20 seconds.
SIP T1 Timeout
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
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.
SIP Transport
Determines the network protocol used for the SIP transport. Users can
choose from TCP, UDP and TLS. The default setting is “UDP”.
SIP Listening Mode
Based on option “SIP Transport” and this option “SIP Listening Mode”, GRP
will decide which transport protocol it should listening to from the incoming
request. The default setting is “Transport Only”.
• Transport Only
• Dual
• Dual (Secured)
• Dual (BLF Enforced)
SIP URI Scheme when
using TLS
Specifies if “sip” or “sips” will be used when TLS/TCP is selected for SIP
Transport. The default setting is “sips”.
Use Actual Ephemeral
Port in Contact with
TCP/TLS
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”.
Outbound Proxy Mode
The Outbound proxy mode is placed in the route header when sending SIP
messages, or they can be always sent to outbound proxy.
Support SIP Instance ID
Defines whether SIP Instance ID is supported or not. Default setting is “Yes”.
SUBSCRIBE for MWI
When set to “Yes”, a SUBSCRIBE for Message Waiting Indication will be
sent periodically. The phone supports synchronized and non-synchronized
MWI. The default setting is “No”.
SUBSCRIBE for
Registration
When set to “Yes”, a SUBSCRIBE for Registration will be sent out
periodically. The default setting is “No”.