[Serusers] Asterisk/Digium as PSTN gateway and SER as backend soft switch?

[Jan Janak]

On 21-04 14:19, Tom wrote:
> 
>   I don't think SER and SEMS supports any directly attached PRI cards.  It
> is a SIP Proxy registrar, designed to deal with gateways (and Asterisk
> could be a gateway).

  SEMS can act as an ISDN gateway, it supports directly attached PRI
  cards (Eicon Diva as en example).

>   However, I don't think that Asterisk makes a very cheap gateway.  Once
> you factor in the cost of the card, the G.729 codec license, and a fast
> enough computer to do the coding (since the T1 card does not contain any
> DSPs), 
> it doesn't seem so cheap anymore.  And you'll end up with a gateway
> which doesn't support VAD/CNG or G.723 either.  A used Cisco 2621 with a
> HDV card starts to look good.  You get dedicated DSPs for coding, and
> support for a variety of different CODECs.  Plus working VAD/CNG.

   Jan.