ISDN30 Call Capacity

[Stinley]

Apologies for the basic nature of these questions...
I understand my company has 30 channels coming into the business via an ISDN30 card; does this mean that we can only accept 30 concurrent calls before calls are rejected or the caller receives a busy tone?

Does the 31st caller receive a busy tone?

For us to miss calls as a business, do the calls have to hit our PBX at exactly the same time, or does there just have to already be 30 external calls taking place?

Any information you can provide will be greatly appreciated.

Cheers, Stinley

 

[srmega41]

You are on the right track. Think of each channel as a talk path in and out of your PBX. If 30 people are on calls in and out, another inbound caller would hear a busy signal. The same would be true if an internal user tried to make an outbound call, and the ISDN30 route was full, and was the only option for that outbound call.

As calls are completed, the channels release and become available.

Hope this helps,

Scott M.

 

[Stinley]

Thanks Scott.

We have an option 11 at another site, so it is possible that calls may route in/out of this if our ISDN30 channels are all full.

Thanks again

 

[srmega41]

You would need to add additional entries (ENTR 1, 2) to the RLI that is used for your outbound calls. For this, you can then send them over to the Option 11 and out trunks there, again if they are available.

RLI 10 <--for outbound calls
..
ENTR 0
..
ROUTE x <-- This is your ISDN30 route
FRL 2
..
ENTR 1 <-- new addition by you
..
ROUTE 10 <-- This would be the route over the your Option 11
FRL 2

I have this set up at a number of my sites and it works rather well. If you are using MCDN (Meridian Customer Defined Network) routing, all you need to do is make your second option the same route as a direct dial call to the Option 11. Because the call already went through BARS/NARS on the primary system, it does not need to go through again. You may have to make some changes on the trunks between the two to allow those calls, but I do not think you would need anything else. (If I forgot something, someone will certainly let us know)

Hope this helps,

Scott M.

 

[Stinley]

Thanks again Scott