22 Apr
2004
22 Apr
'04
3:09 a.m.
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.