Hello, Perhaps someone can help me with my question below.
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 ... Regards, Costa Christopoulos, P. Eng.
