[asterisk-users] Adding 4 more POTS lines

[Leif Neland]

Jim Freeze wrote:
> Hello
>
> I have a working * server with a TDM card and 4 FXO ports.
> We have 4 lines now and need to add 2 more lines (and possibly two
> more later).
>
> I'm wondering the best upgrade path for this situation.
>
> The simplest I can invision is adding another TDM400 card with
> 4 FXO ports, and use 2 now and the remaining 2 later.
>
> Are there success stories with using 2 TDM cards?
> Any info will be appreciated.

I have no experience with the TDM cards, but costwise it is not the best 
solution, in my opinion.

A TDM04B (4FXO) cost around $378 at voiplink.com, while a  Grandstream 
GXW-4104 (also 4FXO) cost $250 at voxilla.com., and the 8FXO version costs 
$400, almost the same as the 4FXO card.

Having the pstn->ip conversion outside the server reduces the load and makes 
an easier install.

I'm using the GXW-4104 , and besides it has trouble detecting danish 
callerid (a standard not used anywhere else in the world...), i have no 
complaints against it.

Imho, ymmw etc.

Leif