[Asterisk-Dev] How to use more PCI Cards with FXO/FXS in case that TDMoE doesn't work

[Klaus-Peter Junghanns]

Am Mi, 2004-08-18 um 14.23 schrieb Peter Svensson:
> On Wed, 18 Aug 2004, Klaus-Peter Junghanns wrote:
> 
> > > a) get a industrial chassis that would have 10 PCI slots
> > > b) get a channel bank with FXS/FXO cards and Digium TE405P card
> > > c) Define "network crashed" and maybe someone will help you here.
> > d) forget about TDMoE and use IAX2 with trunking
> 
> Doesn't that get you a bit more latency?
Yes, it does. IAX2 uses frames with 20ms of audio where TDMoE uses
frames with 1ms of audio. If your echo cancelation is working on the
pstn interface points then those 20ms wont hurt anybody.

The advantage of IAX2 and trunking is that it will only use the
bandwidth when the channels are actually in use. With TDMoE you 
always use the bandwidth, plus you get a load of small packets
(caused by the small latency) which might bring down a cheap
switch.

> 
> Peter


best regards

Klaus