[asterisk-users] Efficient logging of PRI traffic for later analysis?

[Kevin P. Fleming]

On 01/19/2012 05:25 PM, Tony Mountifield wrote:
> Often, when I want to be able to do post-mortem analysis of network
> traffic, I can have a suitable tcpdump with -w to capture raw packets
> for later analysis with Wireshark. On some systems I have this running
> continuously on the SIP port.
>
> Is there any way of doing something similar with PRI ISDN protocol?
> I certainly don't want to have pri span debug running all the time,
> but from time to time I do get customer queries about calls that have
> failed or dropped for some reason, and it would be very useful to be
> able to view the PRI exchange retrospectively. So I'd like the ability
> efficiently to log PRI traffic raw to a file and then interpret it later.
>
> Does anything like this exist already? Or could anyone point me in
> the right direction for developing something?

Search for 'DAHDI pcap'; in recent versions of DAHDI it has become 
possible to generate PCAP dumps of HDLC traffic on D-channels (which 
could be ISDN, Q.SIG, SS7, etc.).

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
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