sundance-communications.com/forum Forums TDM Business Telephone Systems Mitel Telephones & Systems T1 Digit Issues

Hello and sorry for the long post,

I have an SX-200 system with a T1 Trunk Card connected to another vendor PBX (Adtran). I am setting this up as a proof of concept for a larger project dealing with off-site extensions. The Mitel uses 2xx extensions, Adtran uses 1xx. For the sake of testing only extension 111 is routed across the T1 right now. The T1 is D4/AMI and is configured for E&M Wink.

When placing a call from the Mitel to the Adtran, no digits are sent across the T1. The call will connect just fine, however the adtran obviously has no idea where to route the call (it assumes operator when no digits are received). I have done a DSP capture and verified that the Mitel is indeed not sending any digits.

The link is correctly set up because the Adtran is able to place calls perfectly fine through the Mitel (local extensions and outbound calls). The only issue is for outbound calls from the Mitel to local extensions.


Here is a brief summary of what i have done so far, if anyone sees anything i missed or would like more specific info, let me know.

Form 01 - added the t1 trunk card

Form 13 - created descriptor 05 for T1 E&M, configured settings

Form 15 - individual trunks are present here (100-117) cos=20, cor=1, ten=1, n/m=0, cdn=5

Form 16 - created trunk group 5, SMDR, TERM. added each trunk num 100-117

Form 23 - route num 06 to trunk group 5, digit modification entry 2

Form 26 - new entry, leading digits 111, do not return dial tone, unrestricted COR. strings for this entry: no digits to analyze, 0 qty to follow, designation local, route to 6

Form 42 - descriptor 03 T1 DS1, D4/AMI, standard settings

Form 43 - bay 1 slot 6 (this t1 card) link desc 03


Any ideas or suggestions are more than welcome.

Thanks

What do you have for dig mod 2?

Limited wait for dial tone in trunk cos. Timer value is adjusted in form 4. You may also want to set dtmf in trunk descriptor.

I would set up 1XX as entry for To Analyze and leave 0 digits to follow. Also I would enable Analog Networking for sending digits across P2P T1 in Form 4.

I think the way he has the digit analysis is ok for his test. I agree that after proof, this will require a change like stated (1XX and none or 1X and 1). Sure would be nice to send extension id though, ani/dnis might work between the two. If they were both Mitel analog networking is the way to go.

I think John hit it with the Trunk COS. If you enabled limited wait for dial tone in the COS and set the timer to 1 in form 4 it should force the digits out over the trunk.

Oh, I just noticed something. Set up the leading digit in form 26 as 1 with no return dial tone. Then go into the digit strings and set up 11 as a digit string with no digits to follow and send it to the appropriate route. Make sure the modified digit entry on the route is not deleting any digits.

Looks like it's working now. johnp's advice on the dial tone in trunk COS pointed me in the right direction. I couldn't change that setting as this is not the only T1 in this unit, however i made the Adtran the 'network' role and told it to provide dial tone and everything is working great now.

Thanks for your help

If other T1s are in the system the limited wait for dial tone length should not affect them since (unless they are immediate start - and you rarely see those) then the digits need to be forced. However if necessary you can always put the trunks that you want to force in a separate class of service and enable that option 802

Like Dane suggests, it would be best to copy the current COS to an unused one and move the trunks to it. That way you can tweak each group without interfering with the others.