In a message dated 3/25/99 13:41:44 Eastern Standard Time, [email protected]
writes:
> Assume a TE has an analog PSTN interface (loop start) and a private line
> interface (OPS). Then, according to TSB31 it would have to comply with
> Section 8.9 since the TE has a through path from voiceband private line to
> the PSTN.
> However, If the TE had an analog PSTN interface (loop start) and an
> on-premise (ONS) interface, then Section 8.9 would not be applicable. Why?
> You can still inject 2600 Hz tones into the PSTN from the ONS port.
> It appears that the intent of Section 8.9 is to inhibit 2600Hz tones from
> entering into the PSTN. But why would it apply only to voiceband private
> lines, channels and voiceband metallic channels. Why not Music-On-Hold
> ports or station ports or ...
Costa,
Music-On-Hold ports must also comply with 68.314d Signalling
Interference,
TSB-31B 13.1.5 (See FCC Form 730 Application Guide F-6).
Your second example of station ports would have to comply with 68.314d
if you
connected Non-Registered equipment to those ports, but to accomplish this you
need AGC circuitry & filters on each of those ports (registration class
TOTALLY PROTECTED SYTEMS KY, MY, PY, see Form 730 Application Guide A-6). Not
many systems have this registration because of the added cost and are using
only previously registered devices connected to the station ports. Since the
station devices are registered, they have to meet the requirements of 68.314d.
Contact me if you have any further questions.
Regards,
Larry Stillings
Compliance Worldwide, Inc.
66 Baptist Road, PO Box 233
Canterbury, NH 03224
603-783-4775
www.cw-inc.com
