Ubigate iBG2016 Configuration Guide
© SAMSUNG Electronics Co., Ltd.
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CHAPTER 9.
Extended VoIP Services
This chapter provides an overview of Voice over IP(VoIP) services. The chapter contains the
following sections:
Fax Relay with VoIP
Supplementary services for Call Manager Interworking mode
Supplementary services for Survivable telephony mode
Supplementary services for Stand Alone mode
Fax Relay with VoIP
Introduction to Fax Relay with VoIP
To support fax transmission under a VoIP environment, the following methods
are supported.
y
pass-through(High-bandwidth codec)
y
T.38
The method using Pass-through(High-bandwidth codec) transmits fax through
the use of voice stream of G.711-alaw or G.711-ulaw; and the method using
T.38 exchanges the T.38 Internet Fax Protocol(IFP) packets to transmit the
real-time Group 3 fax documents, which is the ITU-T recommendation.
Regardless of the method specified for fax relay in the VoIP gateway, VoIP
gateway detects the fax tone, and codec negotiation is done before fax
transmission if codec needs to be changed.
This section describes how to configure each of them to support fax relay
under VoIP environment.
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