[asterisk-users] Bridged PRI calls - processor involvement?

[Steve Hanselman]

The setup.

Asterisk is on a 3G Zeon Dell 2850 running Fedora Core 5/6 (all yum
updates applied), the TE410 lives on it's own interrupt.
Asterisk sits between our telco and a PRI enabled PBX.
These are the relevant versions installed:

Linux: 2.6.20-1.2316.fc5smp
Zaptel: 1:1.4.2.1-34.fc5
Asterisk: 1:1.4.0-34.fc5.at
Libpri: 1:1.4.0-16.fc5.at
Wildcard details:
Found TE4XXP at base address fe3ffc00, remapped to f88bec00
TE4XXP version c01a016a, burst OFF, slip debug: OFF
Octasic optimized!
FALC version: 00000005, Board ID: 00
Reg 0: 0x377bb400
Reg 1: 0x377bb000
Reg 2: 0xffffffff
Reg 3: 0x00000000
Reg 4: 0x00000001
Reg 5: 0x00000000
Reg 6: 0xc01a016a
Reg 7: 0x00001f00
Reg 8: 0x00000000
Reg 9: 0x00ff0000
Reg 10: 0x0000004a
TTE4XXP: Launching card: 0
TE4XXP: Setting up global serial parameters
Found a Wildcard: Wildcard TE410P (3rd Gen)
TE4XXP: Span 1 configured for CCS/HDB3/CRC4
TE4XXP: Span 2 configured for CCS/HDB3/CRC4



The problem:

At random points during calls we lose 1-3 seconds of speech (both ways
both callee and caller), this can be replicated (or at least a very good
approximation!) by generating a high level of interrupt/cpu activity
(for instance copying data from a USB caddy as we tried the other day in
an attempt to reproduce this more reliably).

The calls are bridged PRI:PRI calls, no VOIP involvement.

This was not a problem until approx 3-4 weeks ago, but I can't tie it
down to an exact date.

Steve


> Interrupt sharing is not a problem anymore with those cards.  What 
> version of zaptel did you try installing?  Can you explain more about 
> your problems?  Also, your configuration and setup would help out as 
> well.
>
> ---
> Matthew Fredrickson
> Digium, Inc.


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