[Asterisk-Users] Help! Problems talking to upstream switch

[tim.mcqueen at qualisys.biz]

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 at 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
	
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