> 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?