Hello all, I have a Mediant 1000 SBA setup that is working fine and am now trying to add fax functionality directly off of the Mediant 1000 by adding a 4-port FXS module to the Mediant 1000. After adding the module it comes up correctly in the Mediant Gateway UI and then I can assign it as a trunk and channel and give it the 4-digit number we want to use for the Fax but then I'm stumped as all the documentation I see talks about routing things to fax servers etc by giving it an IP address. I want to have the fax directly plugged into the FXS module and have fax calls go directly there. So, I don't see how to do any routing as all of it pertains to IP stuff and there isn't an IP address related plus I must be missing something in the config of the module itself as when I pick up the fax handset I don't even get a dial tone just a static-y hiss. I'm going to try to get into the AudioCodes forums themselves but thought I'd start here as there seem to be some serious experts on the topic hovering around. So, let me know if you have any ideas

Steve

ok, some more info that may help. It seems I don't have the software key for IP2IP on the Mediant 1000. I'm guessing I need this, can anyone verify this? Also, it sounds like I need Lync to be the "PBX" for the fax machine so I need to route calls for the fax number through the gateway into Lync (where I've registered the Device as a fax device with the Mediant as its "gateway") so that Lync can then route it back out to the Mediant to be answered (if I have my IP to Tel routing right). Is that correct? Also, in instructions I've seen it looks like I need to enable IP2IP application support for this. Is that correct? If so, is there an upgrade key I need? How do I figure that out? I do now have a dial tone but cannot get a call to come through to the fax (even though I see the attempts through syslog on the gateway). Any help would be appreciated

Steve

Hi,

It is a Audiocodes support question. You'd better contact Audiocodes produce engineer for help.

yeah, thanks. I've asked them also but no response there either. Since I'm trying to get faxing going through the AudioCodes device AND Lync I thought I'd try here also. Is no one doing faxing with Lync? Can anyone give me the generic Lync method for dealing with faxes?

This is from my notes to setup FXS on Mediant 1000:

Trunk Group

Select FXS module, Enter channel number on the module, phone number, Trunk Group ID (next in line number)

Routing, Tel to IP Routing

Source Trunk Group ID * , Dest Phone Prefix, Dest IP Address (it's own IP address), port (5068), TCP ---> For each number (on this gateway)

Source Trunk Group ID (where is it coming from (PRI Lines)), Dest IP Address (it's own IP address), port (5068), TCP ---> For each number

Routing, IP to Trunk Group Routing

Dest Phone Number,  Trunk Group ID for that number.

Manipulation, Dest Number Tel -> IP

Dest Prefix, Prefix to add (to make the full number) ---> For each number (on this gateway)

Let me know if you have any question. Match colors.

Thank you.

• Marked as answer by scarr4 Monday, October 01, 2012 9:48 PM

thanks for the response. i have things setup just like you notes suggested (very helpful for verification, thanks). the calls seem to route just fine now but the fax machines on the other end don't seem to like what they hear (they just hang up after hearing the fax tones from my machine). What fax protocol settings are you using, G.711 Transport? Using preamble on T.38? Are you able to use "secure all calls" with it (SRTP)? Any other thoughts on why it isn't quite working?

Steve

I am just learning AudioCodes, so I could be not the best help, but I will tell you what I know.

You need to have the following setup:

VoIP, SIP Definitions, General Parameters

Fax Signaling Method - T.38 Relay

Configuration->VoIP->Media->Fax/Modem/CID Settings

Fax Transport Mode Relay/Enabled

V.21 Modem Transport - Type Enable Bypass

CODERS

U-law

A-law

G.729

Tel Profile settings

Fax Signaling Method - T.38 Relay

IP Profile settings

Fax Signaling Method - T.38 Relay

Sorry, that is all I have in my notes.  You will have to call AudioCodes if this does not work.  If you do, please let me know how you fixed the problem.  I will add it to my notes.

thanks. i tried your settings (as they were different than mine) but got the same result. Time to try and get AudioCodes to respond.

thanks again

Steve

Not a problem.  Sorry, it did not work.  Please let me know what you do to fix it.

Thank you.

i'll keep you posted. BTW, anyone do this fax thing by bypassing Lync altogether with a Mediant 1000. I don't see a way but i've seen how-to's for Lync about bypassing it so am wondering

Steve

Source Trunk Group ID * ,Dest Phone Number, Dest IP Address (it's own IP address), port (5068), TCP ---> For each number (on this gateway)

Note, I had Dest Phone Prefix, but it needed the full number.

Thank you.

Hi scarr4,

I did not follow your complete thread, but I use fax on the Audiocodes gw always without configuration in Lync. This was the best and easiest way to successful configure all fax machines.

that is what i've been reading but haven't found how to do it that way as all the routing is either "Tel to IP" or "IP to Tel" whereas what i want to do is Tel to Tel and there doesn't seem to be that option so any pointers would be much appreciated.

thanks

Steve

Steve,

Check this guide.  It explains how to connect AudioCodes Mediant 1000 to the fax using the FXS ports:

http://kb.faxback.com/file/view/Mediant+1000+Configuration.pdf

I hope this will help.

Thank you.

Ok, you have to configure from the T1 Routing tel to IP and the IP to tel to route to the FXS port like

T1 Routing to 127.0.0.1 and the from 127.0.0.1 to the FXS port for the faxnumbers

Ok, I think Im catching on. Since I have TLS setup for working with the SBA do I need to use that for the 127.0.0.1 or can I use TCP or UDP for transport type?

well, no matter what I try in the Tel to IP routing table it seems to ignore it and route to our SBA even though I put the route to 127.0.0.1 at the first line matching the 4-digit Dest Prefix coming in from the T1 lines. not sure what to try next and am completely baffled why there isn't any documentation for using the local loopback when routing straight to an FXS port. All I've seen thanks to Igor's link is for routing to a Fax server etc. Anyway, any thoughts appreciated as usual

Steve

First of all, I would not use 127.0.0.1.  Use the IP address of the AudioCodes device.

Second, can you run logs to see what is going on?  You might see what the problem is.

Thank you.

• Marked as answer by scarr4 Monday, October 01, 2012 6:53 PM

great, got it working with the actual IP (accidentally had it using a proxy set at first). thanks for all your help (both of you). Obviously Lync and faxing do not mix as once I took Lync out of the loop (bypassed it completely) then all worked beautifully. it would be nice to get the CDR info on these extensions but at least it now works.

Phew!

thanks

Steve

Hi Scarr4, yes with integration in Lync you can have the CDR reports.

If you need the CDR info, you could use a syslog Server and send the CDR info from the Audiocodes to this Sylogserever as textfile.

Hi,

I know I'm posting one year later, but I was just wondering if you found any solution for this or you still run the fax environment without Lync in the picture.

Thanks a lot!

Alex

• Edited by Alex Costea Wednesday, September 11, 2013 11:53 AM

we never went back after getting faxing to work while bypassing Lync. We decided the CDR stuff wasn't as necessary as having faxing simply work. I've done this at two other sites now and gone the same route (one site I run through a Dialogic box and straight out to a few AudioCodes MediaPack boxes. This works like a charm.

Steve

Hi Steve!

Thanks a lot for your response! I do have one more question: within your fax environment, do you also have the option 'send faxes to email'?

Thanks!

Alex

sorry, no, we don't use that option. We do only a little faxing and it is usually for privacy reasons (we are a medical school and need to keep patient records confidential so we try to keep them out of email altogether).

Steve

Ok, understood. Thanks a lot for your responses!

Alex

Steve

Sorry to drag up this post that will never die!

How did you get around your proxy sets issue.  Our fax number is always going to the Lync using a proxy set.  If I remove the proxy set then no calls get through so I am unsure how to proceed here without breaking Lync just for a single fax machine!

Thanks

I'm assumin you mean on the AudioCodes gateway coming in from the outside. I just do it in the routing. Any fax routes come first  in the list  (get explicit matching with destination number and source trunk etc) with Destination IP set to our fax gateways (MP-124's etc) and then we have a catch-all routing rule at the bottom which is a match for our proxy set number. Whether it is Tel to IP or IP to Tel as long as you have your routing rules set you should be fine

Steve

We are trying to setup using the direct fax plugged into the FXS port.  Tel2IP points to the IP of our Mediant 1000 and then IP to trunk points from the fax destination number associated with the FXS port to the trunk port associated with the FXS lines.

The FXS port blinks when I attempt to call the FXS number associated with the port but I get no ringing on the handset of the fax and when I answer the LED continues flashing and the caller hears constant dialling.  When attempting from the fax itself I have no dial tone.  I am using a RJ11 cable with only the two centre pins connected as per instructions I have read online.

Its as if the call is being routed but I am unable to answer from the analog device.

Any ideas folks?

• Edited by Powerupandpray Thursday, October 03, 2013 3:27 PM

Please check your Routing from tel-to-IP, ip-to-tel and check, that you use the right codec for you IP Profile.

Maybe this will help

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=2&cad=rja&ved=0CDUQFjAB&url=http%3A%2F%2Fkb.faxback.com%2Ffile%2Fview%2FMediant%2B1000%2BConfiguration.pdf&ei=LpNNUtb2D9HEswbJh4C4CQ&usg=AFQjCNGVKyervjpvMY-mTucaFCipzPUM7w&bvm=bv.53537100,d.Yms

I have found that the very best way to figure this stuff out is to turn on syslogging and point the IP to your workstation and then download a simple tool like ACSyslog098.exe and then run that exe and make some calls back and forth to see what is happening. Usually the logging is pretty clear once you get used to it. Other than that if you can post the parts of your board config file that applies wh=ith the numbers your trying to route and  I could see if it makes sense.

Steve

hmmm, no. As far as I've noticed those ports put out a dial tone without even being configured because I've learned that having a dial tone means nothing w.r.t. whether you can make incoming or outgoing calls.

Steve. Do the FXS ports show up fine as a trunk group option in the web UI?

For fax, you dont have to route everything to the proxy. I would recommend to route the FXS port direct to the pstn line.

On the M1K Gateway, you will route the FXS Fax port with tel-to-ip (127.0.0.1) and than ip-to-tel to the isdn trunk

I never route the fax calls to Lync. 

You have to setup Control Network -> Proxy set table and Control Network -> IP group table .

Use IP group number from that table. I would recommend not to use 0.

If the routing is corect, you will have a dial tone or you get a busy tone.

You have to setup the correct routin tel-to-ip and IP-to-tel. The callflow from and to the FXS port will always go through the IP stack. 

For fax, you dont have to route everything to the proxy. I would recommend to route the FXS port direct to the pstn line.

On the M1K Gateway, you will route the FXS Fax port with tel-to-ip (127.0.0.1) and than ip-to-tel to the isdn trunk

I never route the fax calls to Lync.