[asterisk-users] Best config for 12 FXO system?

[Steve Totaro]

Tony Mountifield wrote:
> I have a client who wants a Meetme box with 12 FXO ports, to connect
> to Analogue lines coming from an Ericsson PBX.
>
> It looks like I could do this with four different hardware configurations:
>
> a) three TDM04B cards (based on TDM400P)
> b) one TDM04B and one TDM808B
> c) one TDM804B (or TDM854B?) and one TDP808B
> d) one TDM2403B (half filled TDM2400P)
>
> Apart from considerations of cost and PCI slot availability, are there any
> technical reasons to choose one of the above configurations over the others?
>
> Cheers
> Tony
>   
If the Ericsson PBX has a T1 card already and you have one in your 
asterisk box, that would be the cleanest way of acheiving what you 
want.  You could also use a channel bank with the analog and convert to 
T1 for the Asterisk connection.

I try to use T1 (PRI if possible) whenever more than four analog trunks 
will be involved.  I have had tons of bad experiences with analog cards, 
very few with ISDN.

Thanks,
Steve Totaro