16 Jan
2018
16 Jan
'18
11:24 p.m.
Would this be a good job for the Viking Electronics DLE-300?
It emulates a CO with a pair of POTS lines, so you can call from port to
port on it. It emulates all of the correct tones and CPC, both modems think
they are on POTS lines. Makes it very easy to connect a pair of modems
back-to-back, and fwiw it supports data to 112,500.
You might also be able to use a Viking DLE-200B but they are not nearly as
feature-full as the 300. Should work, though, but the data will be limited
to 14,400 or so IIRC.
On Tue, Jan 16, 2018 at 4:59 PM, Grant Taylor via cctalk <
cctalk at classiccmp.org> wrote:
On 01/16/2018 03:15 PM, Peter Corlett via cctalk
wrote:
The tightwad fix is to bodge a PP3 battery onto a
line splitter, which is
often enough to convince modems that there is a phone line. There is no
dial tone nor ring signal, so you need to turn off dial tone detection on
the calling modem ("ATX1", IIRC) and somehow tell the answering computer to
send "ATA" to answer at the right time.
Sounds like an interesting hack. But should probably be good enough for
most of what is desired.
I'm going to have to look into this.
It's just a bit of test gear, which you should be able to find on eBay. I
suspect it will be priced like obscure test gear
as well.
That's what I've found.
With the kit I have available, I'd just spin up Asterisk or FreeSWITCH on
a handy Linux box, set up a minimal local-only
PBX, and plug the modem into
a VoIP ATA. This eliminates four hops worth of latency and jitter via an
external VoIP provider and thus should reduce or eliminate retrains and
disconnects.
Yep, that's the route that I'd go too. Or maybe even FXS ports in an
adapter in the PBX itself.
Link - Analog Telephony Cards for Asterisk | Digium
- https://www.digium.com/products/telephony-cards/analog
I could try and order an analogue phone line, but I suspect that KPN
doesn't have a script for that and would get
very confused. (I also don't
care to pay their extortionate tariff of 11 cents per minute for local
calls.)
I'm not surprised.
I think a number of analog phone lines are now really something digital to
the neighborhood / house (possibly ~> likely VoIP) and splitting it out the
B1 locally. So even those might not support modem / fax as well as an old
school B1.
--
Grant. . . .
unix || die
--
Grant. . . .
unix || die