Vector Product Manual
55
There are two basic types of SLICs: integrated and nonintegrated. An integrated
SLIC is connected by fiber-optic cable or copper wire to the telephone office. It
is a high capacity digital device that is actually part of the phone company
switching equipment. Your call undergoes an analog to digital conversion in
the cabinet, and stays in that form all the way through the telco switch. An
integrated SLIC is very modem-friendly, as it shortens that analog part of your
phone line, avoiding loading coils and extra bridge taps. A nonintegrated SLIC
is not tied directly to the switch, but requires a companion unit at the telco
office that will introduce another set of digital/analog conversions, and that will
limit modem performance. It may be better than an excessively long copper
line, but it will not be as good as an integrated SLIC.
AND NOW BACK TO THE CHECKLIST!
If the phone company believes that you have a bad cable pair, they will
probably switch you to another pair. This is a good opportunity to request
(dont demand) the shortest possible routing for the line, hopefully without
loading coils and with a minimum number of bridge taps. You can also plead
not to be put on a nonintegrated SLIC, as that may worsen the situation.
If the phone company thinks your line is OK, you may want to try an
end run around the regular people. The telco folks have higher-level
customer service people who can advocate for you within the company. If your
monthly bills are substantial enough, you can request that such a person be
assigned to your account. If that fails, you might contact the person in charge of
media relations in your area. They want to stay friendly with radio and TV
stations, and may be able to connect you with an influential inside person. As
always, be friendly and diplomatic. Mugs and T-shirts might be an idea for
people who seem to be working on your behalf. It wouldnt hurt to have your
call letters on their desk!
Attention tech types: If you used to order equalized phone lines for
remotes, and you still remember which cable pairs the telephone company
used for the lines to your studio, you might try requesting one of those pairs for
your POTS codec line. Equalized lines are usually free of loading coils and
bridge taps and are tested more rigorously for noise and balance.
If you are absolutely stuck with a lousy phone line to your studio, you
might want to try creating a perfect phone line from an ISDN line (assuming
that is available). All you will need is a computer-type external terminal adapter
with at least one POTS port. That port will have ringing and dial tone just like a
regular phone line and will be all-digital to the phone company. You will need
to program the TA with a computer, entering switch type, SPIDs and LDNs.
After that, no computer connection is necessary.
(128 Seiten)
(4 Seiten)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern