The digital AC line interface for the professional user.

Particularly suitable for universal use.

The standard and versatile Funktronic FT634a-C/NL Line Interface is specially developed for the Dutch market, and can be used with both a transmitter/receiver and a control unit to make it suitable for 2- or 4-wire (leased) lines with channel switching. The FT634a-C/NL has the possibility of switching channels remotely with a suitable keypad, e.g. the Major 4a/NL, the Major 5a/NL or the Major 6a/NL.

Key features in brief:

• Connections for a (leased) line both for 2- and 4-wire
• Transmitter control with hebulp of a pilot tone (3300 Hz)
• Pilot tone suppression with hebulp of high-quality digital filters
• Reliable pilot display coding in case of unfavourable impendance ratios of the connected (leased) line
• Adjustable equaliser to compensate the frequency response of a bad (rental) line
• Switch on transmitter (PTT) by means of a potential-free relay contact
• 5 tone signalling as per recommendation of ZVEI
• Channel switching through a 5-tone sequence
• 4- or 6-bit channel switching output (black box), 6-bit with 19-inch module
• 6 available switching inputs at the 19-inch module (only with special optional software)
• Squelch input with configurable logic
• Can be configured to be used as a line interface to a control panel
• The input impedance of the (rental) line can be adjusted (high-ohmic)
• The software parameters (RS-232 TTL) can be adjusted using an optional progamming cable, without having to open the line interface