Cisco SPA122 Administration Guide

Configuring the Voice Settings
SIP
Cisco SPA100Series Administration Guide 53
4
SIP Timer Values
Field Description
SIP T1 RFC 3261 T1 value (round-trip time estimate), which can
range from 0 to 64 seconds.
Default setting: 0.5
SIP T2 RFC 3261 T2 value (maximum retransmit interval for non-
INVITE requests and INVITE responses), which can range
from 0 to 64 seconds.
Default setting: 4
SIP T4 RFC 3261 T4 value (maximum duration a message remains
in the network), which can range from 0 to 64 seconds.
Default setting: 5
SIP Timer B INVITE time-out value, which can range from 0 to 64
seconds.
Default setting: 32
SIP Timer F Non-INVITE time-out value, which can range from 0 to 64
seconds.
Default setting: 32
SIP Timer H H INVITE final response, time-out value, which can range
from 0 to 64 seconds.
Default setting: 32
SIP Timer D ACK hang-around time, which can range from 0 to 64
seconds.
Default setting: 32
SIP Timer J Non-INVITE response hang-around time, which can range
from 0 to 64 seconds.
Default setting: 32
INVITE Expires INVITE request Expires header value. If you enter 0, the
Expires header is not included in the request. Range: 0–
(2
31
–1)
Default setting: 240
ReINVITE Expires ReINVITE request Expires header value. If you enter 0, the
Expires header is not included in the request. Range: 0–
(2
31
–1)
Default setting: 30

Cisco SPA122 Specifications

General

Ports	2 FXS ports
Network Interface	10/100 Mbps Ethernet
Voice Protocol	SIP
Voice Codecs	G.711, G.726, G.729 A
Security	TLS
Power Supply	5V DC, 2A
Network Ports	1 x 10/100 Mbps
Fax Support	T.38 fax relay
Operating Temperature	0°C to 45°C
Storage Temperature	14 to 140°F (-10 to 60°C)
Humidity	10% to 90% noncondensing
Weight	0.16 kg