About Configuring The Cisco Gateway For Fax Passthrough - Cisco ATA186-I1 Installation And Configuration Manual

Chapter 7 Using the FAX Passthrough Feature
About Configuring the Cisco Gateway for FAX
Passthrough
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The supporting Cisco gateway can enable FAX passthrough using system level or
dial-peer level commands.
System-Level Command
Enable the FAX passthrough feature using the system level commands:
voice service voip
modem passthrough NSE [payload-type number] codec {g711ulaw |
g711alaw} [redundancy] [maximum-sessions value]
The default payload-type parameter is 100. Valid values are 98 to 119. The
•
NSE payload number must be the same on both the Cisco ATA 186 and the
Cisco Gateway.
• The codec must be G.711u-law for T1 or G.711A-law for E1.
The redundancy parameter enables RFC 2198 packet redundancy. It is
•
disabled by default.
The maximum sessions parameter defines the number of simultaneous FAX
•
Passthrough calls with redundancy. The default is 16; valid values are 1 to 26.
On the Cisco ATA 186, turn off bits 14 and 15 in ConnectMode. This enables
sending FAX passthrough signals and detection of incoming FAX passthrough
signals using the Cisco proprietary method.
The NSE payload-type number, FAX passthrough codec (G.711u-law or
G.711A-law) and redundancy must use the same settings in the Cisco ATA 186
and the supporting Cisco gateway.
Dial-Peer Level Command
The FAX passthrough feature can be enabled for communication between the
Cisco gateway and the specified Cisco ATA 186 using the dial-peer level
commands:
dial-peer voice tag voip
modem passthrough { NSE [payload-type number] codec {g711ulaw |
g711alaw} [redundancy] | system}

About Configuring the Cisco Gateway for FAX Passthrough

Cisco ATA 186 Installation and Configuration Guide
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