[cisco-nas] AS5350 failing to connect to T1 channel

[Richard Greasley]

Hello,
an AS5350 is acting as a gateway, this AS5350 interfaces with a Nortel
Option11 PBX.
I'm experiencing a very weird issue whereby calls that are coming into my
gateway are not coming through.
This is what I get from a "show call history voice brief"
16D3 : 114966hs.73 +-1 +1453 pid:11 Answer
 dur 00:00:00 tx:338/13520 rx:0/0 10  (normal call clearing.)
 IP xxx.xxx.xxx.xxx:17692 rtt:121ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g729r8

16D3 : 114966hs.74 +-1 +1455 pid:84 Originate 4029
 dur 00:00:00 tx:0/4294963252 rx:338/17564 10  (normal call clearing.)
 Telephony 3/4:0 (74): tx:13580/0/0ms g729r8 noise:-120dBm acom:127dBm

Here's a snippet of my configs:

controller T1 3/4
 framing esf
 linecode b8zs
 cablelength short 133
 ds0-group 0 timeslots 1-24 type e&m-immediate-start

voice-port 3/4:0
 timeouts call-disconnect 10
 timeouts ringing 30

dial-peer voice 84 pots
 max-conn 24
 destination-pattern 4...
 no digit-strip
 port 3/4:0

dial-peer voice 11 voip
 max-conn 96
 incoming called-number 4...
 session target ipv4:xxx.xxx.xxx.xxx
 dtmf-relay h245-alphanumeric
 codec g729r8 bytes 40
 fax rate disable
 ip qos dscp cs5 media
 ip qos dscp cs5 signaling
 no vad

"Cisco Internetwork Operating System Software
IOS (tm) 5350 Software (C5350-IS-M), Version 12.2(2)XB6, EARLY DEPLOYMENT
RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Mon 17-Jun-02 16:53 by hwcheng
Image text-base: 0x600089C8, data-base: 0x61200000

ROM: System Bootstrap, Version 12.2(1r)1, RELEASE SOFTWARE (fc1)
BOOTLDR: 5350 Software (C5350-BOOT-M), Experimental Version
12.1(20000922:142008) [nag-flo_t_0110 101]

as5350-1 uptime is 28 minutes
System returned to ROM by reload at 12:20:53 UTC Tue Oct 7 2003
System restarted at 12:22:21 UTC Tue Oct 7 2003
System image file is "flash:c5350-is-mz.122-2.XB6.bin"

cisco AS5350 (R7K) processor (revision T) with 131072K/65536K bytes of
memory.
Processor board ID JAE065000H5
R7000 CPU at 250Mhz, Implementation 39, Rev 1.0, 256KB L2, 2048KB L3 Cache
Last reset from IOS reload
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
Primary Rate ISDN software, Version 1.1.
Manufacture Cookie Info:
 EEPROM Type 0x0001, EEPROM Version 0x01, Board ID 0x32,
 Board Hardware Version 3.33, Item Number 800-5171-02,
 Board Revision B0, Serial Number JAE065000H5,
 PLD/ISP Version 2.2,  Manufacture Date 17-Dec-2002.
Processor 0x14, MAC Address 0x0B46825D40
Backplane HW Revision 1.0, Flash Type 5V
2 FastEthernet/IEEE 802.3 interface(s)
194 Serial network interface(s)
216 terminal line(s)
8 Channelized T1/PRI port(s)
512K bytes of non-volatile configuration memory.
32768K bytes of processor board System flash (Read/Write)
8192K bytes of processor board Boot flash (Read/Write)

Configuration register is 0x2102"

Now when a call comes in to the 5350 signalling the PBX, I never do see it
connected. What else I'm seeing is that the phone would ring, and once its
picked up by a staff member, all they would get is "dead air". I asked that
the phone company setup the system so that when I dial an extension number,
I'll get to use the same T1 channel and connect to another one of our
gateway. At one instance I was getting a very loud analog modem sound. Now
however, 50% of the times we will hear a busy tone.

Anyone have any suggestions, as to what I should do.

Thanks,
Richardg;