Description
Parameter
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.
Display Anonymous From Header
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.
Sip Accept Encoding
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.
Disable Local Name To Header
Sets if the phone uses IPv4 or IPv6.
Default: IPv4.
SIP IP Preference
SIP Timer Values (sec)
Description
Parameter
RFC 3261 T1 value (RTT estimate) that can range
from 0 to 64 seconds.
Default: 0.5 seconds
SIP T1
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
SIP T2
RFC 3261 T4 value (maximum duration a message
remains in the network), which can range from 0 to
64 seconds.
Default: 5 seconds.
SIP T4
INVITE time-out value, which can range from 0 to
64 seconds.
Default: 16 seconds.
SIP Timer B
Non-INVITE time-out value, which can range from
0 to 64 seconds.
Default: 16 seconds.
SIP Timer F
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Cisco IP Phone Troubleshooting
SIP Timer Values (sec)