Planning and Installation Guide Chapter 12: Planning Applications and Services
164 Fax Server Integration Details
Instead of requiring users to have two separate DID numbers (one for voice and one for
fax) a single DID line can handle voice calls and inbound/outbound faxing.
A user's extension (which can be 3, 4, or 5 digits) is sent to a fax server via in-band Dual
Tone Multi Frequency (DTMF) digits. The fax server uses this information to create a
mapping between the user's extension and his or her email address.
Once configured, incoming fax calls are received at the user's phone extension. The fax
server listens for the fax tone, takes over the call (assuming the fax redirect radio button
has been selected in Director). When the fax transmission is complete, the loop current is
automatically turned off to terminate the fax call, and the and fax is forwarded to the
associated email address. Enhanced FAX Server Integration
In addition to calls redirected from a user's extension, the ShoreTel system will now deliver
digits to a Fax Server for DID calls routed directly to a FAX server, thus allowing the call to
go directly to the fax extension and provide DID/DNIS digits, instead of to an extension
number and then to the fax server. Configuring Fax Server Integration
At a high level, the process of setting up the Fax Server Integration feature involves three
Connecting the hardware (i.e. connecting the fax server ports to the analog ports
on the switch)
Creating a user account to represent each analog port
Enabling the Fax Server Integration feature for each user account
To configure the Fax Server Integration feature:
Step 1 Configure a fax server per the manufacturer's instructions.
Figure 12-2 Fax server integration call flow
1. Fax Call
2. User or voice mail
answers Fax call
3. Call is redirected to fax
redirect extension
4. Fax server
5. DTMF of
dialed number
invokes Fax
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