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IP PBXs USER MANUAL
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 Auto Answer : Auto-answer enables the IPPBX to automatically answer the inbound calls from analog ports.
 Auto Answer Time : The time in second after the call is auto answered.
 Block Anonymous Calls:
If enabled, all anonymous (without caller ID) calls will be blocked by the phone system.
 Jitter Buffer : Jitter buffer can be used to resolve the sound distortion caused by network congestion, timeing drift or route
changes.
 Call Forward CID : The incoming call numbers are allowed to be transmitted through other digital trunks.
 Press 0 to Operator : Calls that are unanswered due to the disable of extension’s voice mailbox, it will prompt a ‘Press 0 to speak
with an operator’.
 Indicate Line Busy : Whether to enable the announcement of ‘Line Busy’ when the outgoing line cannot be connected.
 Blind Transfer Callback : Enable the blind transfer for unanswered call to be transferred.
 Diversion : While forwarding/transferring a call out through SIP trunk, the actual caller number can be passed to the forwarded
number with diversion option enabled, but requires the SIP trunk service provider support this feature, otherwise please disable
this option.
 PPI : The P-Preferred-Identity (PPI) header is used among trusted SIP entities (typically intermediaries) to carry the identity of the
user sending a SIP message as it was verified by authentication.
 Abandoned Call Logs : Whether to record the abandoned call that are in the queue into logs.
 SIP Header Type: The header type for PPI and Diversion.
The user extension number and system extension number ranges are defined here to avoid any conflicts within the IPPBX system. You
can modify these number ranges as per your requirements. The user extension number could be 2 to 11 digits. And Call Retrieve
Number
range need to be modified from the
Feature Codes
screen.
9.2
VoIP Advanced
Path: Telephony -> Preferences -> VoIP Advanced
Global SIP settings allow you to configure some general and advanced options for the IPPBX system global SIP preferences.