User Guide

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R27A/V
Admin Guide
designated SIP account.
MinLocalSIPPort:To configure maximum local SIP port for
designated SIP account.
Caller ID Header:To choose caller ID header format.
Provisional Response ACK:100% reliability for all provisional
messages, this means it will send ACK every time the phone
receives a provisional SIP message from SIP server.
Register with user=phone:If enabled, the phone will send
user=phone within SIP message.
Anonymous Call:If enabled, R27 will block its information when
calling out.
Anonymous Call Rejection: If enabled,calls who block their
information will be screened out.
Missed Call Log:If enabled, any missed call will be recorded into
call log.
Prevent Hacking:If enabled, it will prevent SIP messages from
hacking.
Figure 4.2.5 SIP call related