[cisco-voip] PRI 's Roll

[Nate VanMaren]

On a SIP/H.323 gateway to mess with individual channels, to take a trunk out of service without dropping existing calls:

CHQVG001(config)#int s0/0/0:23
CHQVG001(config-if)#isdn service ?
  b_channel  Specify the B-channel or range of B-channels, 0 for the complete interface.

CHQVG001(config-if)#isdn service b_channel ?
  <0-24>  B channel range or 0 for complete interface

CHQVG001(config-if)#isdn service b_channel 1 ?
  state  Specify the desired state.

CHQVG001(config-if)#isdn service b_channel 1 state ?
  <0-2>  Valid states are 0=Inservice 1=Maint 2=Outofservice

CHQVG001(config-if)#isdn service b_channel 1 state 2 ?
  hard       Change the service state and clear the call.
  immediate  Send the service message right away (default)
  soft       Change the service state once the channel becomes idle.
  <cr>


CHQVG001#sh isdn service 
PRI Channel Statistics:
ISDN Se0/0/0:23, Channel [1-24]
  Configured Isdn Interface (dsl) 0
   Channel State (0=Idle 1=Proposed 2=Busy 3=Reserved 4=Restart 5=Maint_Pend)
    Channel :  1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4
    State   :  2 0 2 2 2 2 2 2 2 2 2 2 2 0 0 0 0 0 0 0 0 0 0 3 
   Service State (0=Inservice 1=Maint 2=Outofservice 8=MaintPend 9=OOSPend)
    Channel :  1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4
    State   :  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2



-----Original Message-----
From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of tmdvoip
Sent: Wednesday, January 06, 2010 9:10 AM
To: 'Jason Shearer'; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] PRI 's Roll

Jason S.

I liked your idea about testing each channel.

These are your words below.

"You can test each channel if you would like by shutting #2 & #3 down and
busying out all channels but one on #1.  Place test call.  Rinse and repeat
till you have tested all channels."

I hate being so ignorant on this topic, but how would I busy out all the
other channels?

For example, just keep dialing in bound calls from various phones?

I do know how to shut down PRI/GW #2 and #3.

Also, let me make sure I have my terminology right.

The PRI/GW contains the channels IE 23 usable for ea PRI.
I have 3 PRI's/GW equals 69 channels. Right?


Thanks, TMD

-----Original Message-----
From: Jason Shearer [mailto:jshearer at amedisys.com] 
Sent: Tuesday, January 05, 2010 3:03 PM
To: tmdvoip; cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] PRI 's Roll

Ask these questions:

1) What order are they rolling in?
2) What distribution algorithm are they using?  (top down, circular, etc)

You can test each channel if you would like by shutting #2 & #3 down and
busying out all channels but one on #1.  Place test call.  Rinse and repeat
till you have tested all channels.

I typically request top down from the provider and do just the opposite
outbound.  If they are going top down 1,2,3 I will go outbound bottom up
3,2,1.

Jason

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of tmdvoip
Sent: Tuesday, January 05, 2010 1:56 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] PRI 's Roll

Guys:

This is my configuration
CUCM 4.2(3)sr4a (2) Cm in cluster
Cisco Unity 4.0(5.0)
Cisco 2851 Routers


Here is the situation: My client complains that external callers sometime
get an error message from our Telco Provider AT&T saying (all circuits are
busy).

I opened a ticket with the provider and they confirmed that there was a
power outage at one of their locations. Therefore, the Telco Provider AT&T
circuit has no power and our PRI goes down.

My client has 3 PRI's configured and they are supposed to roll from one PRI
to the next as call volume increases. The thing of it is my client has 3
PRI's with 23 channels each that are way-way under utilize. My question is
should the incoming calls just transition to the next PRI in the group? Am I
missing something? Is my Telco sales person says we are configured to roll
to the PRI. Why is it not rolling?

Sincerely,
Thomas Dooley
Cisco Telecommunications Administrator
Triad NC
Desk: 336-917-7125



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