Specifications

23-2
Cisco Unity Express Voice-Mail and Auto-Attendant CLI Administrator Guide for 3.0 and Later Versions
OL-14010-09
Chapter 23 Configuring Your Cisco IOS Gateway for T.37 On-Ramp and Off-Ramp Fax Support
Deployment Scenarios
Figure 23-1 Cisco Unified CME Deployment Example
Figure 23-2 Cisco Unified Communications Manager Deployment Example
Fax Call Flow
The fax call is established in phases. First, the call originator prepares a fax and dials a destination
number. When the destination fax device picks up the call, the originator and destination are connected
in voice call. However, to transition to fax transmission, one party must signal that it is a fax device.
Each device can send its signal using one of the following methods:
230490
FXS
Cisco Unity
FXO
Cisco Unity Express
on Router
Cisco Unity Express
on Router
FXO
Mime encoded message
over SMTP message
VPIM Message
over SMTP
Cisco IOS fax gateway
T.37 onramp/offramp
Mime encoded message
over SMTP message
Cisco IOS Fax gateway
T.37 onramp/offramp
PSTN
VPIM Message
over SMTP
VPIM message
over SMTP
230491
FXS
Unity
FXO
H.323
H.323
Cisco Unity Express
on Router
Cisco Unity Express
on Router
FXO
Mime encoded message
over SMTP message
Mime encoded message
over SMTP message
JTAPI
Cisco Unified CallManager
Cisco Unified CallManager
JTAPI
IOS Fax gateway
T.37 OnRamp/OffRamp
IOS Fax gateway
T.37 OnRamp/OffRamp
PSTN