Question on FXS/DID for Fax application

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May 7th, 2009
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I have customer who has installed a FAX card in an IBM As400. the application is for inbound fax to the AS400. Customer says the Fax board can detect DNIS....so when a fax comes in for extension 1234, it will file it electronically in the database for 1234. If it comes in with a DNIS of 5678, it will store it in the 5678 database.

Telco brought in a single DS0 T1 set up for e&m-wink-start dtmf dnis. The router sees DNIS from the telco. The router also has a FXS/DID card that attaches to the FAX board on the AS400. I want to send DNIS down the FXS to the AS400 fax board.

First, is this the appropriate hardware to do this? I'm wondering if the FXS/DID is typically used to receive DNIS from a telco, but not generate it.

If so, do you have a configuration for the FXS/DID card so that I can send the DNIS derived from the T1? Thanks.

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rchilcote Thu, 05/07/2009 - 04:44
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An FXS/DID VIC cannot send true DNIS. What it can do is send DTMF digits (received from the T1 circuit) to the fax server with dial-peer statements. Use the "forward-digits 4" command under the pots dial-peer to send 4 DTMF digits to the fax server ports.

kbyrd Thu, 05/07/2009 - 05:04
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Thank you for your response. Do I need anything on the voice-port to enable sending the DTMF to the fax machine?

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