asterisk users - Jun 2003 - Help! Problems talking to upstream switch

Hi,
	Please let me know if you have any ideas - I am taking wild guesses now....
Here is the situation:

	I put in Asterisk for a local customer.  I have Fractional T-1 with 12
Voice & 12 Data.  I have a T100P hooked up to a TDM Card (they call it a
chanel bank although it only has 2 outputs) in a CAC unit.  The unit also
has a router card that runs the data side.  My extensions are all SIP phones
save a few fax machines.  The customer has 7 digit unverified account codes
on the trunks for billing purposes.

The Problem:

	As I watch the console, I see calls coming in for exten "73" or
"708" or
"08" or "730" although most come in correctly (ie
"7308").  My carrier has
verified numerous times that they are sending 4 digits.  I have 40 DID
numbers that need to be routed and they are all in the 73xx range.  I need
to know anything that would cause my box randomly not to hear all 4 digits
on occasion.  Also, I have had trouble with people who dial out getting a
congestion signal mainly on Long Distance numbers.  The person would dial
the number 4 or 5 times and get congestion then it might go through.  Both
of these conditions seem to be happening only about 10-20% of the time.

What I have done:

Moved a T100P card to its own IRQ to prevent problems with interrupts - Did
not solve either issue.

On the second try, got the carrier to change the way their switch chooses
channels for incoming calls to prevent "glare" - This MAY have fixed
the
outgoing long distance issue as it seems to have gone away( although it
doesn't seem logical to me that this would affect only LD) but did not fix
incoming calls.

Has anyone else had problems getting all of the digits that the Telco sends?

Thanks,
Andy Hester
Consero

Whats the sound quality like on the calls especially when multiple calls
are going?

On my home system, I had a problem that DTMF was sometimes not correctly
recognized and would either dial incorrectly or not at all. It was
evedent when dial tone was played that it crackled. Also when multiple
calls where running each would start to sound like crap. This was later
tracked down to a timing problem. 

Since you mention using a CAC with 2 ports on it and a router, I'm going
to assume you have a ADIT 600. Make sure the Adit is set to take timing
from the telco, and then make sure you are set to take your timing from
it. Check to make sure each of the T1 ports a:1 and a:2 are set to take
timing from a:1 if it is your telco port. This will keep you from
slipping and causing potential problems.

Come to think of it, there is a way to test this without bringing the
T1s down. The Adit 600 has a show performance command, I may be wrong,
but I'm sure it was performance, anyways it allows you to see slips and
bipolar violations and a couple other stats. This was beneficial for me
as the T100P didn't report problems but the Adit did.

Home this helps.
   

On Sun, 2003-06-29 at 20:59, Andy Hester wrote:
> Hi,
> 	Please let me know if you have any ideas - I am taking wild guesses
now....
> Here is the situation:
> 
> 	I put in Asterisk for a local customer.  I have Fractional T-1 with 12
> Voice & 12 Data.  I have a T100P hooked up to a TDM Card (they call it
a
> chanel bank although it only has 2 outputs) in a CAC unit.  The unit also
> has a router card that runs the data side.  My extensions are all SIP
phones
> save a few fax machines.  The customer has 7 digit unverified account codes
> on the trunks for billing purposes.
> 
> The Problem:
> 
> 	As I watch the console, I see calls coming in for exten "73" or
"708" or
> "08" or "730" although most come in correctly (ie
"7308").  My carrier has
> verified numerous times that they are sending 4 digits.  I have 40 DID
> numbers that need to be routed and they are all in the 73xx range.  I need
> to know anything that would cause my box randomly not to hear all 4 digits
> on occasion.  Also, I have had trouble with people who dial out getting a
> congestion signal mainly on Long Distance numbers.  The person would dial
> the number 4 or 5 times and get congestion then it might go through.  Both
> of these conditions seem to be happening only about 10-20% of the time.
> 
> What I have done:
> 
> Moved a T100P card to its own IRQ to prevent problems with interrupts - Did
> not solve either issue.
> 
> On the second try, got the carrier to change the way their switch chooses
> channels for incoming calls to prevent "glare" - This MAY have
fixed the
> outgoing long distance issue as it seems to have gone away( although it
> doesn't seem logical to me that this would affect only LD) but did not
fix
> incoming calls.
> 
> Has anyone else had problems getting all of the digits that the Telco
sends?
> 
> Thanks,
> Andy Hester
> Consero
> 
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
-- 
Steven Critchfield <critch@basesys.com>

I'm new to *, but I've dealt with this issue on other switches.  It
sounds like either you are timing out getting DNIS information from your
CO, or you are having trouble hearing the DTMF tones that are pulsed to
you during the call setup process.  Someone else on the list may know:
is it possible to 1) configure the timeout for waiting on DNIS and 2) is
it possible to change the Rx gain on the TDM cards?  
 
It's my understanding that the circuit is going throught the channel
bank, which is acting like a drop-and-insert CSU by forwarding the 12
channels with voice to your * box.  You mentioned that this was a
Carrier Access channel bank, is it an ADIT 600?  There are send and
recieve gain settings on the channel bank unit that you might want to
play with.
 
HTH, HAND
 
-Tim

	-----Original Message----- 
	From: Andy Hester 
	Sent: Sun 6/29/2003 8:59 PM 
	To: asterisk-users@lists.digium.com 
	Cc: 
	Subject: [Asterisk-Users] Help! Problems talking to upstream
switch
	
	

	Hi,
	        Please let me know if you have any ideas - I am taking
wild guesses now....
	Here is the situation:
	
	        I put in Asterisk for a local customer.  I have
Fractional T-1 with 12
	Voice & 12 Data.  I have a T100P hooked up to a TDM Card (they
call it a
	chanel bank although it only has 2 outputs) in a CAC unit.  The
unit also
	has a router card that runs the data side.  My extensions are
all SIP phones
	save a few fax machines.  The customer has 7 digit unverified
account codes
	on the trunks for billing purposes.
	
	The Problem:
	
	        As I watch the console, I see calls coming in for exten
"73" or "708" or
	"08" or "730" although most come in correctly (ie
"7308").  My
carrier has
	verified numerous times that they are sending 4 digits.  I have
40 DID
	numbers that need to be routed and they are all in the 73xx
range.  I need
	to know anything that would cause my box randomly not to hear
all 4 digits
	on occasion.  Also, I have had trouble with people who dial out
getting a
	congestion signal mainly on Long Distance numbers.  The person
would dial
	the number 4 or 5 times and get congestion then it might go
through.  Both
	of these conditions seem to be happening only about 10-20% of
the time.
	
	What I have done:
	
	Moved a T100P card to its own IRQ to prevent problems with
interrupts - Did
	not solve either issue.
	
	On the second try, got the carrier to change the way their
switch chooses
	channels for incoming calls to prevent "glare" - This MAY have
fixed the
	outgoing long distance issue as it seems to have gone away(
although it
	doesn't seem logical to me that this would affect only LD) but
did not fix
	incoming calls.
	
	Has anyone else had problems getting all of the digits that the
Telco sends?
	
	Thanks,
	Andy Hester
	Consero
	
	_______________________________________________
	Asterisk-Users mailing list
	Asterisk-Users@lists.digium.com
	http://lists.digium.com/mailman/listinfo/asterisk-users
	

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