[asterisk-users] Quality problems with ISDN PRI

[Matthew Fredrickson]

Carles Pina i Estany wrote:
> Hello,
> 
> We have an Asterisk server with a TE410P Quad-Span togglable E1/T1/J1
> card, 3 SPANs configured and OK and one SPAN unconfigured.
> 
> In our tests it works fine, but when it has a big laod of calls (say,
> from 40 to 60) we have quality problems: some calls has the sound
> cut-off (during the call, voice was not stable)
> 
> The IRQ card is alone, CPU load was not high, network was fine for sure.
> This server is receiving the calls from SIP channels and routing to the
> primaries. It's a HP server, multicore, multiCPU.
> 
> I'm wondering if someone has had these kind of problems (quality
> problems, sound cut off) with 40 and 60 calls but not with 2 or 3, using
> Digium cards.
> 
> Bit later I will call to Digium but I thought that here there is lot of
> people with lot of experience with these cards.

There are a number of factors that can contribute to this type of 
problem, but probably the best solution is to call support and talk to 
them about this.

-- 
Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc.