SFA

SFA is a G.SHDSL-based voice multiplexer supporting up to 6 POTS using a G.SHDSL connection with transparent CLIP/CLIR transfer.

HELIX

Helix is a voice multiplex system transmitting up to 224 POTS or 112 ISDN users over one fiber glass connection.
It consists of a central multiplex transmission unit, a central network management card, POTS and ISDN cards as well as integrated Pair Gain Systems.

The DiS-Plus Family is is a modular System for increasing the distance of analog or  ISDN lines.
It can be used either as an extension after a Telephone System or after VoIP Gateways.