Matrix SETU VFX44L, System Manual

Page: 101 / 195

Matrix
101 SETU VFX88L
/
VFX44L V1
System Manual
Fax over IP (FoIP)
What’s this?
• This chapter describes the application of gateway for using the Fax
feature. The gateway supports Fax Over IP (FoIP).
• The gateway can be used for sending Fax message as explained
below. Following example explains how fax calls will be handled by
the Gateway.
Example:
Service Provider
Network Operations
Fax-A
Gateway-1
IP Network
Access
FXS1
FXS2
Fax-B
Gateway-2
FXS1
FXS2
SIP:
123@abc.com
SIP:
456@xyz.com
IP N/w
IP Network
Access
3567@Matrix.com
2468@Matrix.com
9753@Matrix.com
8642@Matrix.com
How to use it?
• User will select type of FAX that will be supported by the gateway,
from: T.38 (UDPL), T.38 (RTP) and Pass through. It is preferable
that this selection is same as type of Fax settings at ‘remote end’.
• User of Gateway-2 operates ‘Fax B’ to make fax-call by dialing
123@abc.com.
• If Gateway-1 supports ‘T.38’, it acknowledges the request.
Otherwise, it sends ‘CANCEL’ message to Gateway-2.
• The Gateway -2 re-negotiates with Gateway-1 for another vocoder
(Normally G.711). This time, it is responded by Gateway -1 with
same vocoder G.711, and the Fax-Call is established. This is called
‘Fax Pass Through’.
• Similarly the fax-call is set when user of Gateway -1 initiates the
call for Fax B by dialing 456@xyz.com.