Aastra 480i Administrator's Manual page 25

• Send MAC Address in REGIS-
TER 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 REGIS-
TER 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 regis-
tered.
• Session Timer
The time, in seconds, that the IP
phone uses to send periodic re-
INVITE requests to keep a ses-
sion alive. The proxy uses these
re-INVITE requests to maintain
the status' of the connected ses-
sions. 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 transac-
tion 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 Retry Timer
Specifies the time, in seconds,
that the phone waits between
registration attempts when a
registration is rejected by the
registrar.
• BLF Subscription Period
Specifies the time period, in sec-
onds, that the BLF feature
becomes active again after a
software/firmware upgrade or
after a reboot of the IP phone.
RTP Settings
You can configure the following
RTP settings:
• RTP Port
(RTP Port Base in IP Phone UI)
The Real-Time Transport Proto-
col port base configured for the
IP phone. Default is 3000.
• Basic Codecs (G.711 u-Law,
G.711 a-Law, G.729)
(not configurable via IP phone
UI). Enables or disables basic
codecs. Enabling this parameter
allows the IP phone to use the
basic Codecs when sending/
receiving RTP packets. Valid
values are 0 (disabled) and 1
(enabled). Default is 0 (dis-
abled).
• Force RFC2833 Out-of-Band
DTMF
(not configurable via IP phone
UI). Enables or disables out-of-
band DTMF. Enabling this
parameter forces the IP phone to
use out-of-band DTMF accord-
ing to RFC283. Valid values are 0
(disabled) and 1 (enabled).
Default is 1 (enabled).
• Customized Codec Preference
List
(not configurable via IP phone
UI). Specifies a customized
Codec preference list which
allows you to use the preferred
Codecs for this IP phone. For
valid values, see
DTMF Global Settings"
page 148.
IP Phone SIP Admin Guide
"RTP, Codec,
on
17