Isdn Question For A Newbie

[mtorres1445]

How important is it, that all of the ISDN numbers have to be sequential? Im having problems receiving incoming DSN calls. What should be the first thing to look at?

[robertk]

How important is it, that all of the ISDN numbers have to be sequential? Im having problems receiving incoming DSN calls. What should be the first thing to look at?

They don't have to be in sequal att all..

But you MUST program the numbers into the videoconference equipment. See the manual for your equipment, or installation document.

//Robert

[trapehzoid]

they must all be in the same area code though!

[Sean Lessman]

they must all be in the same area code though!

Absolutely! They must have the same area code because Bonding only sends the last 7 digits and assumes the same area code.

Also make sure the LEC is the same (xxx yyy zzzz)...the 'yyy' numbers. If not you may be getting lines from two different switches and while in theory it should work -- my experience has shown it to be problematic since the switches may not be synchronized.

Sean

[mtorres1445]

Here's the situation, I have a customer with a moblie VTC (a system that rolls around to different conference rooms with adtran units already there) they are having problems with receiving incoming DSN, I was wondering if the switch pad settings are off. What should they be set at?

[mtorres1445]

all of the numbers are in pretty good sequence, all area codes are the same, and the prefix is the same but the last four our slightly out of sequence, i dont think its the problem, but i just want to exhaust all possibilities

[channelmaster23]

The numbers can be off, but it sounds like a SPID problem in the ADTRAN to me. I'd go back in and recheck the SPID settings if I were you.

[mtorres1445]

Spids are right, ive checked checked and double checked, could it be the LDN's, I have them set at the last 4 digits now, What should the pad settings be set at?

[mtorres1445]

Any takers.......

[ChuckF]

Base Telco, Tech control, or your carrier should be able to tell you if your SPIDS are registering with their upstream switch. The LDN's do matter too. And depending on the switch, they could be 7 or 10 digits. That is dependant on how the switch tech programmed them within the upstream switch as well.

I recommend trying 7 digit LDN's, then try 10 digits if 7 does not work. Don't waste your time by testing all three, jsut get one line working first.

When you say you have checked and re-checked your spids, who did you check them with or against?

[ChuckF]

One last thing. You mentioned that you were having trouble receiving incoming DSN calls. Can they make outbound DSN calls? And what about commercial calls? (Disregard if only DSN capable).

[mtorres1445]

i am the base telco... im just helping out some contractors to get some experience under my belt, just being thorough. ive tried 7 digit LDn's not 10 though...maybe thats next

[mtorres1445]

yeah, out bound calls can be made DSN/commercial, also we can receive incoming commercial but not DSN

[ChuckF]

yeah, out bound calls can be made DSN/commercial, also we can receive incoming commercial but not DSN

Since you can make and recieve calls, then it is not your SPIDs or LDNs. Your config on the Adtran is fine.

This leads to some other questions.
Are the circuits being delivered to this codec coming directly from an outside carrier/provider? Or do they go through base telco (a base switch) before they are handed off to the codec in the room. If they are "extended" from another switch "on prem", then the routing/programming/provisioning within the switch is incorrect.

[mtorres1445]

they go through the base switch, calls are made DSN with the YBB-XXXX prefix then they are routed through the switch to the YKK-XXXX number then they hit the VTC, these are all unclass VTC's, i think my pad settings may be wrong on my switch but dont know what they should be...sorry about all the X's and Y's

[VTCNE]

I sounds like you have two different exchanges for commercial and DSN:

"they go through the base switch, calls are made DSN with the YBB-XXXX prefix then they are routed through the switch to the YKK-XXXX number then they hit the VTC, these are all unclass VTC's, i think my pad settings may be wrong on my switch but dont know what they should be...sorry about all the X's and Y's"

In this case you may be providing 7 digits properly on the commercial number, but not matching the DSN exchange. In order to make this work, I would send only four digits from the base switch and set the LDN's to four in the VC unit. The calling party would receive 4 digit numbers for bonding and prepend the rest from the original call.

By the way, if this is really the case, a single channel call into your unit would probably work so you should try that first before making changes to the switch.

[11B-33T]

Quick side note folks, CONUS DSN switches have been in the process of being moded/upgraded since the beginning of the year. There have been some pretty interesting impacts but you should be seeing decreasing problems. Has this problem been resolved?