asterisk users - Nov 2003 - <--PRI--> * <--PRI--> modem bank - problems

Gentlemen

We are attempting to use * in a simple switching application:

              +-----> office lines
              |
              V
LEC <--PRI--> * <--PRI--> modem bank (56k dialup modems)

The problem is that (even with no office lines active) the modems
have difficulty establishing a connection, the connection is slow
(way too slow for 56k modems) and the connections are prone to dropping.

We have tried the Dial 'd' and 'c' options, but they did not
help.

The modems work fine when the PRI from the LEC goes straight into the
modem bank.

Any ideas about what is wrong here?

Gary

Gary,

	What does your clocking setup look like?  In a general telco sense I
would expect it should look something like this:

LEC PRI I/Fto *: Loop
* PRI I/F to Modem Bank: Internal
Modem bank PRI I/F to *: Loop

Got a smart CSU (or two) you can put inline on the PRI lines and take a
look at the ESF channel messages?

			THX/BDH



On Mon, 2003-11-03 at 12:32, Gary Mart wrote:
> Gentlemen
> 
> We are attempting to use * in a simple switching application:
> 
>               +-----> office lines
>               |
>               V
> LEC <--PRI--> * <--PRI--> modem bank (56k dialup modems)
> 
> The problem is that (even with no office lines active) the modems
> have difficulty establishing a connection, the connection is slow
> (way too slow for 56k modems) and the connections are prone to dropping.
> 
> We have tried the Dial 'd' and 'c' options, but they did
not help.
> 
> The modems work fine when the PRI from the LEC goes straight into the
> modem bank.
> 
> Any ideas about what is wrong here?
> 
> Gary
> 
> 
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
>