Tieline TLPOTSVIA - POTS Interface Module for ViA Codec

The ViA POTS G5 module is essentially the same as other G5 POTS modules in Genie and Merlin codecs. It can be used in the codec to stream high quality audio over a POTS (PSTN) phone line. The Tieline Music algorithm can deliver 15 kHz quality bi-directional audio at bit rates as low as 24kbps over a POTS connection.

Modem Negotiation and Line Quality
The codec can send and receive high-speed digital information over a standard POTS telephone line via the modem in the ViA POTS module.

ViA POTS module modems initially attempt to establish a link at the lowest Maximum Bit rate setting configured in the POTS Module settings. If the POTS line doesn't support a selected bit rate, the modems will attempt to connect at the highest possible bit rate to suit the prevailing line quality at each end of the link. The modem then performs a process called ‘training’, during which the codecs at each end of the link analyze the line. The codecs will then 'renegotiate' the link downwards to the highest possible bit rate where line quality is greater than 70%.

The ViA POTS module contains a SmartDAA™ (Smart Data Access Arrangement) line interface, which isolates the modem from voltages on phone lines. It is important to select the correct country in the codec from which you are dialing. This allows the SmartDAA to automatically adjust for varying ring tones and line impedances in different countries.