[cisco-voip] Inserting a pause in an outbound dial with a PRI

[Robert Kulagowski]

I have a site in Beijing, and the office used to prepend "96556" on 
their old PBX.  This prepend was a way to send the calls over an 
alternate, cheaper carrier.

I'm trying to do something similar using CM and H.323 gateways.  When I 
manipulate the dialed number appropriately and prepend the 96556, my 
call completion went down the tubes - I'd get 2/3 of the calls failing 
to complete.  Since my techno-mandarin is non-existent, it's been a pain 
to troubleshoot.

One suggestion I received is that we need to pause after sending the 
96556, so that the PSTN class 4/5 switch that we're connected to has a 
chance to react before we send it the rest of the digits.

I'm not sure I know how to do that on a PRI, because when I look at the 
q931 debug, I see the called number go out in a single message.

Ideas?  CM 4.1.3, IOS 12.4(15)T1