On Sun, Mar 18, 2012 at 10:58 AM, Jeromy
<fuji246@gmail.com> wrote:
> I'm trying to convert from Asterisk to Freeswitch, and have a question about
spans.
>
> I read the freetdm configuration example for TDM400
> and am wondering what exactly is a span.
>
> I have 2 TDM400P cards in my computer,
> one card has 2 FXS modules for connecting analog phones.
> The other card has 3 FXO modules for connecting to 3 PSTN trunk lines.
>
> # lsdahdi
> ### Span 1: WCTDM/4 "Wildcard TDM400P REV I Board 5"
> 1 FXS FXOKS (In use) (EC: OSLEC - INACTIVE)
> 2 FXS FXOKS (In use) (EC: OSLEC - INACTIVE)
> 3 unknown Reserved
> 4 unknown Reserved
> ### Span 2: WCTDM/4 "Wildcard TDM400P REV I Board 5" (MASTER)
> 5 FXO FXSKS (In use) (EC: OSLEC - INACTIVE)
> 6 FXO FXSKS (In use) (EC: OSLEC - INACTIVE)
> 7 FXO FXSKS (In use) (EC: OSLEC - INACTIVE)
> 8 unknown Reserved
>
> Do I configure freetdm as in the example for TDM400
> with separate spans for each module like the following?
> or should I have just two spans as shown by lsdahsi?
> Thanks.
>
Hi Jeremy
Do you find the answer to this question?
I'm also very confuse on the span and channel in both asterisk and
freeswitch, and I've found little explaination on this.
" A span is a logical unit that represents a group of channels.
With digital telephony, a span usually represents a physical port on the card.
If the system has only one such card with a single port, so it is referred to
as span 1. "
Could anyone help on this?
At the very least you need 2 freetdm span configurations because you cannot mix FXS and FXO channels in the same FreeTDM logical span.
For the given hardware output, I'd simply create 2 spans, one for all the fxo channels and one for all the fxs channels.