Description
Parameter
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
Select Yes to enable or No to disable.
Default: No
Disable Local Name to Header
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
INVITE final response, time-out value, which can from 0 to 64 seconds.
Default: 16 seconds.
SIP Timer H
ACK hang-around time, which can range from 0 to 64 seconds.
Default: 16 seconds.
SIP Timer D
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
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Cisco IP Phone Web Page
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