Obihai OBi100, Administration Manual

Page: 150 / 220

Copyright 2010-2013 Obihai Technology, Inc. 150
Note: Option not available on OBi100 and OBi110 (where
the short inter-digit timer is always 2s)
Tip Ring Voltage Polarity
IdlePolarity Tip/Ring voltage polarity the line is idle, before a call is
connected, or after one side hangs up. Choices are:
Forward, or Reverse Forward
ConnectPolarity Tip/Ring voltage polarity when the line is connected on a
call.
Note: By using a different polarity for an Idle and a
Connected line, OBi effectively generates a polarity
reversal signal to the PHONE port, which can be used to
signal the attached phone equipment that the call is
either connected or ended. Forward
Telephone Line Interface Features of the OBi Device
Line Port Status Event Package
OBi device accepts subscription to the proprietary x-line-port-status event package for notification of status change on its
LINE port. The SIP SUBSCRIBE may be directed to SP interfaces. The SIP NOTIFY sent by OBi device to the subscribers of this
event package includes an XML document in the message body with the proprietary Content-Type: application/x-line-port-
xml. The XML document has the following format:
<?xml version="1.0"?>