Mitel 3300 With AudioCodes Gateway - PRI Link Flashing 1

[Malex0408]

Hi

We have recently had a new Mitel 3300 system installed where I work. Which I must say is a great system.

Prior to the system installation we used a AudioCodes Mediant 1000 Telephony gateway that used for interfacing with some call control software.

The PRI card on the Mitel connects to the ISDN30 without any problems when connected directly to the system but when I plug the ISDN30 into the AudioCodes and then back to the 3300 the link light on the PRI card flashes and does not go solid green.

Can anybody help me with any troubleshooting tips on finding out why the connection is not being made when the ISDN30 passes through the AudioCodes.

Thanks in advance.

Mark

 

[danramirez]

what are the states of the PLIDs when the link light flashes?

Do a: ST <PLID> and tell us what it says

Let us know if need help with finding what PLID your E1 card is.

Regards,

Dsniel

 

[Malex0408]

Thanks for Replying Dsniel,

I will have a look and get back.

I can get onto the 3300 from home but the ISDN is connected straight into the phone system at the moment.

I think the Mitel Engineer said that the channels were unassigned when he had a quick look when the system was installed.

Regards

Mark

 

[danramirez]

Mark,

UNASIGNED???

Go to the form "Digital Trunks" and make sure there is a "Trunk Number" against every channel of the E1.

What sort of card do you have? If it's a Dual T1/E1 first of all test the card by looping the two E1 Ports. The Mitel Eng. should be able to sort this out.

Post back with comments when on field.

Regards,

Daniel

 

[danramirez]

Mark, what's an audocodes gateway? Is it sort of a blackbox with E1 interface on one side and SIP on the other?

Make sure you correctly program "Digital Link Descriptor" and Trunk Circuit Descriptor".

If an audiocodes g/w is what I think, why not connecting the IP trunks (SIP) directly to the Mitel Controller?

Regards,

Daniel

 

[Malex0408]

Hi Daniel,

The Audiocodes is a device that sits between the ISDN30 and the phone system it has 2 E1 ports and also SIP capabilities, we've just used the 2 E1's.

We have a server that runs a software solution for call handling (incoming/outgoing) that staff log into. When staff log in to the client side software the server instructs the Audiocodes to call their extension which the staff member takes off hook. The the software then has control over the users phone.

I'm new to the phone system world from a technical point of view so excuse my level of knowledge.

I've looked in Digital Trunks and their is a Trunk Number against all the Channels.

Thanks for your help with this. The Mitel Engineer din't want anything to do with the problem. To make things worse the company that installed the AudioCodes has vanished from existence.

Luckily they left the passwords set as default that allows me to have a look at configs.

I'll have a look early tomorrow morning for the Status of the E1 interface and feed back the output.

Mark

 

[sarond]

Also make sure that you are providing clocking (network sync) to the Mitel from the Audiocodes Gateway.

We had a setup where we had ISDN30 -> Quintum Tenor -> Ericsson BP250 -> Mitel 3300. The Mitel was connected to the BP via Q-SIG.

We had issues where we couldn't seem to get sync between the Mitel and BP on occasions, we tried restarting cards, links, doing loopbacks etc... the only thing that fixed it was restarting all devices.

 

[danramirez]

Mark,

Don't panic, we'll give you a hand.

As you have remote access to the switch (the Mitel) send us screen captures of the the following forms:

-Class of Service (The one you use for the ISDN Trunks)
-Digital Link Descriptor (Of course the one you use for the ISDN Trunk)
-MSDN-DPNSS-DASII Trunk Circuit Descritor
-Network Sync.
-Trunk Attributes

By the way, what software version are you running on the Mitel?

Please confirm what E1 card you have on the Mitel, is it a Dual T1/E1 or a Combo Card?

Regards,

Daniel

 

[Malex0408]

Hi Daniel,

I am running software 10.2.0.26_2 release level 2.

Looking in the Hardware of the 3300 its a T1/E1 Combo Card.

You should find attached screen shots of the various forms.

Again, thanks for your help.. I'm going to go into the office early tomorrow to connect the ISDN via the audiocodes to look at the states of the PLID which may indicate where things are going wrong. I take it the PLID numbers reference what slot the T1/E1 card is in the system?

Mark

 

[danramirez]

Mark,

Your programming looks fine to me.

Go into the form: "Digital Trunks" and record what the Trunk Number is for the first channel. We'll call that number ABC.

Then, go into the maintenance command line and enter: LOCATE TRUNK ABC (Where ABC is the number of the trunk you previously looked for) Hit Enter

The system will respond with the Circuit Location (PLID) of the first channel of the E1. a b c d e

Record that PLID, and remember that every time we enter the PLID it should include all spaces. My guess is that your first PLID wil be: 2 1 2 1 1

Now, connect the Audiocodes Gateway to the T1/E1 combo card, let them do the handshake (1 minute) and then enter the command:

STATE a b c d e (Where a b c d is the PLID)
Hit Enter

What's the state of the PLID? My guess is that you would get NOT SEIZABLE or INDETERMINATE state, but not UNASIGNED. Tell us what the state is.

According to the Technicians Handbook, when the card shows flashing green must probably you have not seizable channels, here is what it says:

Embedded PRI
links are “not
seizable”,
Status LEDs
show flashing
GREEN

Verify the “Network Side/QSIG Master”
setting in the Protocol Assignment form.
Check the “Inverted D-Channel” setting in
the Link Descriptor Assignment form -
normally it is set to “No”. Each of these
changes takes approximately 30 seconds.

Also, make sure that you connect to the port labled "Input" not the failover port.

I'll be in my office all morning so as soon as you get results post back.

What time zone are you in? -UK? I'm in Madrid, one hour ahead of you.

Also, get into the Audiocodes programming and try to find equivalent programing on that side. We may need to know what is programmed there so we can make appropriate changes on the Mitel side.

Have a good night, hope we can solve this one tomorrow.

Regards,

Daniel

 

[Malex0408]

Hi Daniel,

you were right the channels were not seizable when the Audiocodes was connected.

I'm a step closer to finding the resoloution. Changing the Q.SIG Master to True allowed the Channel to connect successfully!!

Unfortunatly once connected and the channel in the idle state I was not able to make outbound calls. Mitel 5320IP phone said Invalid after pressing the 3rd number.

I'm assuming this is somthing I need to change in the Audiocodes now.

I'll Attach some print screens of the Audiocode's Trunk Settings.

Thanks

Mark

 

[sarond]

How is your Audiocodes 1000 being used in relation to the Mitel. Is it a gateway to the ISDN30 or is it to be networked where devices call each other from either system.

If it is Q-SIG networked then one system will need to be master and the other will be slave.

If Audiocodes is used as a gateway then you will need to provide clocking to the Mitel.

You will need to check your ARS and trunk group programming etc.. if you are getting invalid when trying to dial out.

 

[danramirez]

Mark,

Great!! now you have minor issues that need to be resolved.

So... it looks like your channels are up between the Mitel and the Audiocodes Gateway. Just to double check, please do another STATE 2 1 2 1 1 and you should get IDLE condition.

Now let's concentrate on what the Audiocodes expect to receive from the Mitel.

What digits should the Audiocodes receive from the Mitel?

What leading digit will you use in order to dial out over the E1 that goes to the audiocodes? (Will you be using 9 or another digit?)

Give us an example of a complete digit string that you want to dial (at the Mitel) and send over to the audiocodes? i.e. 9 0895 123 4567.

Here is a very useful tool that you may use when troubleshooting this kind of things. Go to mainenance command line and do: CCS TRACE ENABLE CONT

This will show you all digits that are sent out and received over the E1 link to the audiocodes.

Make sure you turne it off when you finish as it consumes resources on the Mitel. To turn it off do a CCS TRACE DISABLE

You are almost there, I think that now you have your issues with ARS as "sarond" states.

Please do appologize my English, let me know if something is unclear and I'll rephrase it.

Post back and let us know of new progres.

Regards,

Daniel

 

[Malex0408]

Hi,

Quite sadly, I'm started to get excited.

The audiocodes is being used as a Gateway to the ISDN30 for a peice of software, its unplugged at the moment because we have staff in the office.

We use the software for loading telephone numbers of companies who have announced that the are making people redundant. In Short we have a contract from the governemt to help with re-training and placing people back into work and this is a big time saver which is missed in the office.

When we dial we dial "9 0113 202 5200" its saying invalid after the "9 011".

I checked the sate of the Channel once pluged into the AudioCodes with Q.Sig Master set to True and it reported back idle.

I'll have a look at the CSS Trace tool on the Mitel and see what its sending to the AudioCodes. I'll have to do this at 4.30 UK tonight when staff are leaving the office.
Regards

Mark

 

[danramirez]

Mark,

You get INVALID as the PBX has no idea what to do when you dial 9 011.

You need to program the ARS correctly so the PBX will knoe how to handle the digits 9 0113 202 5200

Let's so something quick here:

1. Go to "Trunk Groups" Add a new Trunk Group (Trunk Group Number 20). Leave everything as default and write the comment tek-tips

2. Add a member to your newly created Trunk Group. Here you can add Trunk Number 101.

3. Go to ARS Digit Modification Plans. Select a number unused (i.e. 15). Select it and double click to change it. Enter 1 in the Number of Digits to absorb. This will remove the first 9 of the complete string 9 0113 202 5200.

4. Go to ARS Routes and select an unused entry (i.e. 40). Routing Medium: TDM Trunk Group. Trunk Group Number: 20. COR Gropu Number 1. Digit Modigication: 15. Digits Before Outpulsing: BLANK. Route type: BLANK. Compression: off.

5. Go to ARS Digits Dialed. Add a new entry. Digits dialed: 9011
Number of digits to follow: 8. Termination Type: Route. Termination number 40.

6. CCS TRACE ENABLE CONT

7. From the Mitel, Dial 9 0113 202 5200

8. What do you see in the CCS TRACE output?

Let us know what happen after testing. I'll be checking the post at 5:30PM my time.

If this works, I'll then help you out programming the rest of the ARS.

Regards, Good luck.

Daniel

 

[danramirez]

Mark,

Did you manage to dial out?

Regards,

Daniel

 

[Malex0408]

Hi Daniel

I've created the new trunk as per your instructions from home. I can't actually dial a number at the moment to test until tomorrow. I went off site. Unless you can dial from a maintenance command?

I'll have a go first thing tomorrow.

Mark

 

[sarond]

If you have DID then you could setup DISA to gain remote access for testing outgoing calls.

 

[danramirez]

Ok Mark, let's waint until you get on site and do your test call. Remember your CCS Traces and make the test call from an IP Set with LCD display, this way you can see what type of error if an unsuccesful call.

As sarond says you can also use DISA if DID is available, but should be used with care, you get the risk of toll fraud.

Regards,

Daniel

 

[Malex0408]

Hi All,

I think I have fixed the problem, To be honest I looked at CCS trace but could not understand most of it. In the end with a combination of turning the Q.Sig Master setting on so that the Mitel saw the channels when plugged into the audiocodes, and changing (actually disabling)a manipulation record that inserted a 0 on the AudioCodes I managed to make an outbound call firstly from a handset and then from the call control software.

A big thank you all for your help.

Mark