Aastra Telecom SISIP 57I CT - Manual (Page 58)

Administrator Level Options
3-18 41-001160-00, Rev 01 Release 2.0
IP Phone Administrator Guide
Administrator Options
• Explicit MWI Subscription Period
The requested duration, in seconds, before the MWI subscription times out.
The phone re-subscribes to MWI before the subscription period ends.
• Send MAC Address in REGISTER Message
Adds an "Aastra-Mac:" header to the SIP REGISTER messages sent from the
phone to the call server, where the value is the MAC address of the phone.
• Send Line Number in REGISTER Message
Adds an "Aastra-Line:" header to the SIP REGISTER messages sent from the
phone to the call server, where the value is the line number that is being
registered.
• Session Timer
The time, in seconds, that the IP phone uses to send periodic re-INVITE
requests to keep a session alive. The proxy uses these re-INVITE requests to
maintain the status' of the connected sessions. See RFC4028 for details.
Default is 0.
• Timer 1 and Timer 2
The time, in milliseconds, that applies to an IP phone session. These timers
are SIP transaction layer timers defined in RFC 3261. Timer 1 is an estimate
of the round-trip time (RTT). Timer 2 represents the amount of time a
non-INVITE server transaction takes to respond to a request.
• Transaction timer
The amount of time, in
milliseconds that the phone allows the callserver (registrar/proxy) to respond
to SIP messages that it sends. If the phone does not receive a response in the
amount of time designated for this parameter, the phone assumes the message
has timed out. Valid values are 4000 to 64000. Default is 4000.
• Transport Protocol
The protocol that the RTP port on the IP phone uses to send out RTP packets.
Valid values are 0 (both), 1 (UDP), or 2 (TCP). Default is 1 (UDP).
• Registration Failed Retry Timer
Specifies the time, in seconds, that the phone waits between registration
attempts when a registration is rejected by the registrar.
• Registration Timeout Retry Timer
Specifies the length of time, in seconds, that the phone waits until it
re-attempts to register after a REGISTER message times out.