Cisco 8800 Series Administration Manual page 291

Cisco IP Phone Troubleshooting
Parameter
Display Anonymous From Header
Sip Accept Encoding
Disable Local Name To Header
SIP IP Preference
SIP Timer Values (sec)
Parameter
SIP T1
SIP T2
SIP T4
SIP Timer B
SIP Timer F
Description
Show the caller ID from the SIP INVITE message
"From" header when set to Yes, even if the call is an
anonymous call. When the parameter is set to no, the
phone displays "Anonymous Caller" as the caller ID.
Supports the content-encoding gzip feature. The
options are none and gzip.
If gzip is selected, the SIP message header contains
the string "Accept-Encoding: gzip", and the phone is
able to process the SIP message body, which is
encoded with the gzip format.
The options are No and Yes. If No is selected, no
changes are made. The default value is No.
If Yes is selected, it disables the display name in
"Directory", "Call History", and in the "To" header
during an outgoing call.
Sets if the phone uses IPv4 or IPv6.
Default: IPv4.
Description
RFC 3261 T1 value (RTT estimate) that can range
from 0 to 64 seconds.
Default: 0.5 seconds
RFC 3261 T2 value (maximum retransmit interval for
non-INVITE requests and INVITE responses) that
can range from 0 to 64 seconds.
Default: 4 seconds
RFC 3261 T4 value (maximum duration a message
remains in the network), which can range from 0 to
64 seconds.
Default: 5 seconds.
INVITE time-out value, which can range from 0 to
64 seconds.
Default: 16 seconds.
Non-INVITE time-out value, which can range from
0 to 64 seconds.
Default: 16 seconds.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
SIP Timer Values (sec)
275