Question on mapping voice-port; getting dial-tone and ringing

[eggoeater]

This is on a 3640 running 12.4.25.

We have four POTS lines running into FXO cards.

One of the lines is our fax line (we rarely get faxes) which is on voice-port 1/1/1.

The fax machine itself is attached to an FXS card, voice-port 2/1/1.

On the fax machine's port, 2/1/1, I have plar configured, and it works fine.

I also have plar configured on port 1/1/1 to connect straight to the fax machine.

When I place an incoming call, I get a dial-tone AND it rings the fax machine.

I've played around with this a LOT, and done a lot of googling, but no luck.

I either get dial-tone + ringing, or just dial-tone.

So, should I be using plar on the fxo port to connect to the fax machine when a call comes in?

Is there a better way to connect two analog ports?

Thanks!!

Steve

Here is the relevant config:

voice-port 1/1/1

description FXO-M1 555-9934 FAX

connection plar 9934

caller-id enable

!

voice-port 2/1/1

description FXS 9934 FAX MACHINE

connection plar 5559934

!

dial-peer cor custom

!

dial-peer voice 9934 pots

destination-pattern 9934

port 2/1/1

!

dial-peer voice 5559934 pots

destination-pattern 5559934

port 1/1/1

!

gateway

!

[dijohn]

You need the connection PLAR .

Is the fax Machine set to Auto-answer for fax?.

When the FAX machine rings can you pick it up and try talking?. Unless we have the voice call up and running, Fax isn't going to work.

Try the

voice-card 0
  no local bypass

Local by-pass allows local calls (calls between voice ports on a router 
or concentrator) to bypass (not use) the DSP to minimize use of system 
resources.

Its the DSP which recognises the CED tone and switch to FAX. 

Here's a doc on CSC which will definitely help you.

https://supportforums.cisco.com/community/netpro/collaboration-voice-video/ip-telephony/blog/2010/10/26/fax-configuration-and-troubleshooting-project

[dijohn]

Whats the intent behind connection PLAR on the FXS port where the FAX is connected?

[eggoeater]

Thanks for your help.

The point of the plar on the FXS port is to connect to the outside dial-tone as soon as it goes off hook.

I'm still confused about the local bypass.

Wouldn't I want to use local bypass? Why would I want to turn it off?

I guess I'm just confused as to the "why" the fax is ringing AND I'm getting a dial-tone.

I would think the router should be "smart" enough not to give it a dial-tone if it's also ringing a line.

Side question: can a call match more than one dial-peer?

If there are multiple dial-peers that could be picked (e.g. one matches the port and another matches the dialed-number) which one is picked?

The one with the lowest number?

Thanks again.

Steve

[Dennis Mink]

It is not clear to me what you are trying to achieve,

as soon as an inbound fax comes in on your FXO port, it is answered as 9934 (by using plar, so yes you need that), after that the outbound call leg is created by

dial-peer voice 9934 pots

destination-pattern 9934

port 2/1/1

this should make the fax ring.

for outbound you would obvisously need a destination pattern such as 9T pointing to your FXO port.

simple and effective.

[eggoeater]

>this should make the fax ring.

Yes, it does make the fax ring, but from the calling phone, I hear a dial-tone at the same time as the ringing.

It's like the calls is getting two separate outbound dial-peers or something.

Thanks

Steve