BCM 50 3.0

[SCs5thGen]

I tried searching for any previous posting but had no luck

I have a customer that has networked together a BCM 400 4.0 and 2 separate BCM 50s 3.0. The BCM 50s have intermittant trouble dialing out and they get Req'd channel not available. It never says "no free lines" and also at this time if someone tries to call in they hear a carrier type message. Doesn't this seem carrier related?
Also, if the PRI was unplugged or the PRI card was disabled an outside caller should hear open ringing, right? Not a carrier message???
The PRI is channelized. Went from 8 to 12channels and is shared with the Internet. I have, many times, looked at the BCM monitor and not all channels are busy.

 

[kungfumstr]

does each site have their own PRI?
is this happening at all sites?
which site did you increase the channels?
are the users dialing thru the network?

if this issue only pertains to one of the bcm50 sites, ensure that the lines are correcty provision in the BCM50 and match what is being allocated for voice on the circuit.

 

[SCs5thGen]

I am having the trouble only on the BCM 50 sites. They are dialing out the PRI and each site has its own PRI. These systems have been in use for 2 years and the trouble started about 3 months ago in San Antonio. The customer complained about it after growing their office from about 15 people to around 30 people. That is when the channels were upped to 12 from 8 but problem is still there. It is now happening at the other BCM 50 site (Dallas) which has had no changes in number of people or anyhting, same carrier at all 3 sites.
DIDs ring straight to the DNs, main number rings to operator in Houston then gets tranfered back to the site intended. I guess the only test I haven't tried is when it is failing to see if it will work on the main number getting transfered back.

 

[telcodog]

Have a look under Dialing Plan>Line Pools> and in the lower screen under Call by Call Limits. Have a look at your Public route and check under the columns Maximum Incoming and Outgoing and make sure they're set to 12 and not 8. It's an area that some people forget to look at when you have more or less than 1 full PRI. If they don't match what is set from the telco, you'll get the kind of error you're seeing.

 

[gberger]

You could also check under configuration-ressources-telephony ressources-pri-provision lines and make sure that the first 12 lines are provisionned.

 

[SCs5thGen]

Gberger...Yes, the first 12 are provisioned.

Telcodog....I looked at the maximum in and out and they were set to 23. I changed both to 12. I have never changed that on any of my BCMs in the past and have never had this problem either.

I guess what has me confused is that I have 2 sites having the same issue both with the same carrier(Logix) which they are usually pretty good. The customer has been up for just over 2 years and one site doubles in size(from 15 to 30) but the other is still the same(about 10 users). The 10 user site has 8 channels. Also with the incomming calls, caller hearing a message that the call cannot go through when there is no one on the phone are maybe 1 or 2 active calls :/
Also, if I unplug the PRI and make a test call, inbound from my cell, I get a busy.(on my BCM, and I use Logix as well) So I should not never hear a carrier message, if the problem is with the BCM, right.....

 

[kungfumstr]

sound to me that there is a mis-match between the B-Channel messaging.
Verify from telco on which channels are used for incoming calls. In the BCM is the PRI set for ascending or descending? Is this matching with Telco?

 

[kungfumstr]

Quick question are these systems updated on their patches? Any ISDN alarms showing in the alarm log?

 

[SCs5thGen]

No ISDN alarms. The one with the most trouble was set to Ascending though. Checking with the carrier to see how they are setup.
Thanks for the heads up.
I hope that does it. Only thing, the other is set as descending but it too has the same problem, just happens a lot less.