Thus spake Scot Desort
I *still* think there is a hunt group problem with that first PRI. If the BA switch does not know that there is a second trunk in the group, then of course, the HiperDSP will return NO CHANNELS, because the telco switch is trying to pass a 24th call to the first PRI. Telco switch is supposed to pass that 24th call to the next trunk in the hunt group which would be your 2nd PRI.
Technically speaking, I don't know enough about PRI call control, so I don't know if the telco switch is keeping track of how many active channels there are on a PRI (via the D channel), and making it's own determination to bump the call the the next PRI in the hunt group, or it asks the HiperDSP (again, via the D channel) how many channels are available, and if it's 0, the telco switch moves to the next PRI in the hunt group.....
The telco switch keeps track of how many channels are available.
Either way, I believe that the DSP is supposed to return that indicator when all channels are full.
Bzzt...no can do. There is no indication such as this. If the DSP (or any PRI equipment) returns an indication that it doesn't have any trunks available, the caller gets a busy indication of some kind (either regular user busy, or some sort of reorder tone), the call does *not* get re-hunted, its released. In all actuality, if all 23 channels are full, the telco switch shouldn't send a request on the D channel at all since it already knows that the span is already full. If it does send a D channel message, there's a *SERIOUS* bug in the telco switch code...and that's rather unlikely. :) -- Jeff McAdams Email: jeffm@iglou.com Head Network Administrator Voice: (502) 966-3848 IgLou Internet Services (800) 436-4456 - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.