🚀 go-pugleaf

>>Just to round off this long-winded article: I don't recommend external
>>TA's. You lose too much bandwidth in 'framing'.

>That depends on what kind of line protocol the TA uses. Currently, the
>most popular (that I'm aware of, anyway) is V.110, which is a non-framing
>rate adaption protocol, and V.120, which is a framing/multiplexing protocol.

>V.120 offers increased functionality over V.110, at the cost of some framing
>overhead.

I thought there was a general move towards V.120, mainly because it allowed
multiplexing. I'm on very shakey ground here... 

>In the case of a PC card, I believe that some framing technique is employed
>whenever one bonds 2 B-channels for increased bandwidth. This may be 
>necessary because of the possibility of path differences (and consecutive
>differences in transmission delay) between the two B-channels.

Using SLIP or PPP and TCP/IP I guess there's always lots of 'framing'.

>Ragnar Nielsen
>Technical Manager
>ID Communication as

Who are ID Comm's? Do you have any PC ISDN cards in Aus?