Polycom SpectraLink 8020 Administration Manual page 136

SpectraLink 8020/8030 Wireless Telephone: Administration Guide for SIP
# 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
136
Call-ID headers differently.
PN: 1725-36038-001-L.doc