Cisco SPA 508G Administration Guide

Cisco SPA IP Phone Field Reference
SIP Tab
Cisco Small Business SPA 300 Series, SPA 500 Series, and WIP310 IP Phone Administration Guide 223
B
Reg Max Expires Maximum registration expiration time allowed from the
proxy in the Min-Expires header. If the value is larger
than this setting, the maximum value is used.
Defaults to 7200.
Reg Retry Intvl (See note
below)
Interval to wait before the IP phone retries registration
after failing during the last registration.
Defaults to 30.
Reg Retry Long Intvl (See
note below)
When registration fails with a SIP response code that
does not match<Retry Reg RSC>, the IP phone waits
for the specified length of time before retrying. If this
interval is 0, the IP phone stops trying. This value
should be much larger than the Reg Retry Intvl value,
which should not be 0.
Defaults to 1200.
Reg Retry Random Delay Random delay range (in seconds) to add to <Register
Retry Intvl> when retrying REGISTER after a failure.
This feature was added in Release 5.1.
Defaults to blank, which disables this feature.
Reg Retry Long Random
Delay
Random delay range (in seconds) to add to <Register
Retry Long Intvl> when retrying REGSITER after a
failure. This feature was added in Release 5.1.
Defaults to blank, which disables this feature.
Reg Retry Intvl Cap The maximum value to cap the exponential back-off
retry delay (which starts at <Register Retry Intvl> and
doubles on every REGISTER retry after a failure). In
other words, the retry interval is always at <Register
Retry Intvl> seconds after a failure. If this feature is
enabled, <Reg Retry Random Delay> is added on top
of the exponential back-off adjusted delay value. This
feature was added in Release 5.1.
Defaults to blank, which disables the exponential back-
off feature.
Sub Min Expires This value sets the lower limit of the REGISTER expires
value returned from the Proxy server.
Sub Max Expires This value sets the upper limit of the REGISTER min-
expires value returned from the Proxy server in the
Min-Expires header. Defaults to 7200.
Parameter Description

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