The network terminator installed by the Telco in Romania works the same
way: it has two "analog" outputs and two digital (S0) outputs. I've also
got a full TDM400 card with 3 FXS and one FXO, but I gave them up gladly
for a proper ISDN card (I'm using a Diva Eicon Server) - and I don't do
billing. Sound quality is perfect, there's no echo and I can use all the
functions of the ISDN card, like the ability to use multiple MSN's, send
an proper "busy" signal at will, get two calls on the same number at the
same time.
And now I've got two unused FXS ports in my Asterisk.
Stefano Corsi wrote:
I must clarify my original message. Maybe confusion is due to my poor
english. So I'll make a list of statements:
- Each ISDN line in Italy can be splitted in two analog lines
- You can use those analog lines as normal analog lines
- I have already invested in analog hardware (my fault of course) for
both FSX and FXO
- ISDN hardware installed by the telco can, in Italy, be programmed to
send a "billing pulse".
- I guess this billing pulse is sent on each of the two analog lines
in which a single ISDN line can be splitted (so there's no risk, I
guess, for double billing).
- I'm considering if there's a small chance for me to avoid buying
additional hardware (ISDN cards or gateways) and have an accurate
billing using those analog lines resulting from splitting an ISDN line.
- To get an accurate billing, I'm wandering if it's possibile to use
"billing pulse" provided by those analog lines.
- I have full specifications of the "billing pulse" provided:
frequency
....................................................................
12 kHz ± 1%
level
..........................................................................
200 mVrms on 200
distortion...................................................................
< 5%
pulse duration
.............................................................125 ± 25 ms
pause duration
................................................................> 180 ms
period
.......................................................................>
300 ms
Do you think it's worth considering it?
Rgds
Stefano
> Bill them both. We are talking about mere BRI's, right:-) Good
catch,
> David. As others noted, billing pulse really applies to analogue
lines
> only, and ISDN providers should always send status.
>
> Yuan Liu
Thanks, Yuan
But my confusion came from the original post stating the use of ISDN
circuits for this implementation. Id ISDN is in fact the circuit of
choice for this app, I agree why wouldn't he simply use the cause codes
for billing purposes. We have a lot of experience in telecommunications
billing, and have always found cause codes to be more than sufficient
even for weird tiers, and bizarre rounding functions.
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