[asterisk-users] T1 Pri Question

[Colin Anderson]

Short answer: a single group should be fine. Long answer: It depends. 

Your Dial() command determines the order in which Asterisk plucks channels
from your PRI. Most north american system call inbound channel 1 first, then
2, etc. It makes sense, then for you to take channels from the topmost
first, for outbound calls. This is dictacted by how you format your Dial()
command: 

g: select the lowest-numbered non-busy Zap channel (aka. ascending
sequential hunt group). 
G: select the highest-numbered non-busy Zap channel (aka. descending
sequential hunt group). 
r: use a round-robin search, starting at the next highest channel than last
time (aka. ascending rotary hunt group). 
R: use a round-robin search, starting at the next lowest channel than last
time (aka. descending rotary hunt group). 

(from voip-info.org)

So, a dial command like:

exten => 1,Dial(Zap/g0/5551212)

would take the channel from the bottom of your group. 

This may have bearing on your situation. However, from what you are
descibing, this seems to be a symptom of a larger problem, that of Asterisk
not correctly hanging up the zap channel and that has nothing to do with
channel selection preferences. Anything weird on your CLI during this
period? 

-----Original Message-----
From: Rob Schall [mailto:rschall at callone.net]
Sent: Tuesday, December 19, 2006 3:03 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [asterisk-users] T1 Pri Question


When setting up the zaptel, etc.... Is it necessary to have a seperate
group for incoming and one for outgoing calls? Either way, does asterisk
always know which channels are open, and does it always clear up a
channel for use once a call completes?

Reason for asking... After dialing into our system over a few DID
numbers, I noticed you can only call 2-3 times before getting a busy
signal. However we have a full 24 channel PRI. During this time, you are
more than able to make outgoing calls over that same PRI. After hanging
up on the incoming call, (outside into the PRI), it can take upto a few
minutes to clear up for the next person to call in.

Any thoughts,
Rob

_______________________________________________
--Bandwidth and Colocation provided by Easynews.com --

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users