Polycom SpectraLink 8020 Administrator's Manual page 76

SpectraLink 8020/8030 Wireless Telephone: Administration Guide for SIP
# be set to anything between 35 and 3600 seconds.
# The default value (which is applied if no parameter is supplied in this file) is
# 3600 which means the phone will attempt to register every 3580 seconds, if the
# server's response interval doesn't take precedence (see below).
#
# If the server has a lower maximum setting or a higher minimum setting that
# this value then the server's response will take precedence and this parameter
# will be ignored.
#
# The phone will always attempt to re-register with the PROXY 20 seconds prior to
# the expiration interval.
# server's response interval doesn't take precedence, then the phone will attempt
# to re-register every 15 seconds.
#
# The lower this setting, the more the impact on the 8002's standby battery life.
#(8002 phones running version 130.003 and earlier code ignore this parameter if
# present)
#PROXY1_REREG_SECS=3600
#-----------------------------------------------------------------------------------------#
# PROXYn_CALLID_PER_LINE controls sending of same Call-ID header
# field for registrations sent to a particular registrar."
# If this is enable we will send
# This may be needed for Mitel 3300 Controller software prior to Release 9
#PROXYn_CALLID_PER_LINE = enable
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Thus, if this parameter is set to 35 seconds, and the
Call-ID headers differently.
PN: 1725-36038-001-H.doc