[Freeswitch-users] Sangoma A102 Overrun Issue

Ryan Wagoner rswagoner at gmail.com
Thu Aug 13 12:34:05 PDT 2009

I've been trying to bridge FreeSWITCH with a Toshiba CIX using qsig
over a PRI. I have a Sangoma A102 card installed in a Dell PowerEdge
with CentOS 5.3. The issue I am having is no packets are being
transmitted back to FreeSWITCH. ifconfig w1g1 shows every frame
received as an overrun. I've tried a different server with CentOS 5.3
with the same issue. I have a support ticket in with Sangoma, but was
wondering if anybody had seen this before.

The T1 shows connected so I think I have the Toshiba configured
properly. From what I've read the overrun has to deal with the driver
not reading the data in time so maybe this is a CentOS 5.3 specific
issue. Any recommendations on alternative Linux distros known to work
with the Sangoma A102 card?


[root at voip ~]# ifconfig w1g1
w1g1      Link encap:Point-to-Point Protocol
          RX packets:22298 errors:0 dropped:0 overruns:274 frame:274
          TX packets:22298 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:1783840 (1.7 MiB)  TX bytes:1783840 (1.7 MiB)
          Interrupt:169 Memory:f8e80000-f8e81fff

[root at voip ~]# wanrouter status

Devices currently active:

Wanpipe Config:

Device name | Protocol Map | Adapter  | IRQ | Slot/IO | If's | CLK | Baud rate |
wanpipe1    | N/A          | A101/1D/A102/2D/4/4D/8| 169 | 4       | 1
   | N/A | 0         |

Wanrouter Status:

Device name | Protocol | Station | Status        |
wanpipe1    | AFT TE1  | N/A     | Connected     |

[root at voip ~]# wanpipemon -i w1g1 -c Ta

***** w1g1: T1 Alarms (Framer) *****

ALOS:   OFF     | LOS:  OFF
RED:    OFF     | AIS:  OFF
RAI:    OFF     | OOF:  OFF

***** w1g1: T1 Alarms (LIU) *****

Short Circuit:  OFF
Open Circuit:   OFF
Loss of Signal: OFF

***** w1g1: T1 Performance Monitoring Counters *****

Line Code Violation     : 45
Bit Errors (CRC6/Ft/Fs) : 0
Out of Frame Errors     : 0

Rx Level        : > -2.5db

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