I have been using a Gandalf 5242i in Plano for about a year now, and it works
GREAT to send and receive FAX and use the POTS port for everything that I used
my old second analog line for. The only gotcha that I have in Plano GTE
territory, is that I generally use the DOSBS mode to skirt the usage charge
that GTE currently imposes on data connections, and so I can only receive
incoming calls to the POTS line when the second channel is not already in use.
There is a feature that can be enabled in your translations at the TELCO that
allow an incoming voice/analog call to ring the POTS line and will properly
tear-down any existing active data connection on the second line when the POTS
line is taken "off-hook". The caveat is that it will not ring thru an existing
voice/analog call; only a data call. The option is referred to as ACO
"additional call offering" which is the ISDN term for the equivalence of "call
waiting". It is generally an additional cost offering.
If you are in a SWB service area, or are using the data mode (and paying the
minute charges) in a GTE area, then this will work for you.
This same feature is also supported with most all ISDN vendors who have POTS
ports. The ringer equivalency for the Gandalf supports somewhere around 4-6
ringers. If you disable the ringers you can chain more devices on the port,
but only those whose ringers are enabled will know about the incoming calls.
Those with other vendors ISDN equipment will need to check the ringer support
for their own boxes. I have three or four devices chained on my POTS port,
including a FAX, modems, and Plain Old Telephone.
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