Lineman´s telephone for field use.
It is a combined analogue and ISDN telephone. Ideal for installation and repair of private ISDN telephone exchanges and private ISDN lines.
Works on the U-interface (2B1Q), private ISDN lines, and the S-interface for the Euro ISDN BRI system.
The S-mode protocols are point to point or point to multipoint. It carries out the 2047-bit BER test and the test time is programmable from 1 minute to 99 hours.
A keypad protocol is available for the control of the supplementary services.
It is possible to measure DC voltage of ±110V on the line and frequencies of 1kHz to 4MHz.
The analogue part can generate flashing and DTMF. Up to 9 telephone numbers can be stored and recalled. Low battery warning is another feature.
A ringer is built-in.