Cisco SPA 508G Administration Guide

Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA 300 Series, SPA 500 Series, and WIP310 IP Phone Administration Guide 94
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Configuring SIP Timer Values
To configure SIP timer values:
STEP 1 Log in to the configuration utility.
STEP 2 Click Admin Login and advanced.
STEP 3 Click the SIP tab.
STEP 4 Under SIP Timer Values, make the necessary configuration changes to the fields
shown in the following table and click Submit All Changes.
Parameter Description
SIP T1 RFC 3261 T1 value (RTT estimate). Ranges from 0 to 64 seconds.
Defaults to .5 seconds.
SIP T2 RFC 3261 T2 value, which is the maximum retransmit interval for
non-INVITE requests and INVITE responses. Ranges from 0 to 64
seconds.
Defaults to 4 seconds.
SIP T4 RFC 3261 T4 value, which is the maximum duration a message
remains in the network. Ranges from 0 to 64 seconds.
Defaults to 5 seconds.
SIP Timer B RFC 3261 INVITE transaction time-out value. Ranges from 0 to 64
seconds.
Defaults to 16 seconds.
SIP Timer F RFC 3261 Non-INVITE transaction time-out value. Ranges from 0
to 64 seconds.
Defaults to 16 seconds.
SIP Timer H RFC 3261 INVITE final response time-out value for ACK receipt.
Ranges from 0 to 64 seconds.
Defaults to 16 seconds.

Cisco SPA 508G Specifications

General

Speakerphone	Yes
Dialer location	Base
Mac compatibility	No
Ethernet LAN (RJ-45) ports	2
Display resolution	128 x 64 pixels
Display number of colors	Monochrome
Headphone connectivity	2.5 mm

Weight and Dimensions

Depth	212 mm
Width	214 mm
Height	44 mm
Weight	900 g