I
NSTALLING
B
OARDS
AND
C
ABLING
41
21/1531-ASP11301 Uen B3 2016-02-17
How to carry out the cross-connection, see Figure 33: Through-Connection on Power
Failure or Processor Malfunction on page 41.
These extensions must not be equipped with digital system telephones. If the public
exchange is not capable of receiving DTMF-signals, then the extension must be
equipped with a rotary dial telephone or a telephone for 10 pps (pulse generator). The
connection to the public exchange must be of analog type.
Figure 33: Through-Connection on Power Failure or Processor Malfunction
4.9 CALL
METERING
4.9.1 CALL
METERING
TLU83/2
The TLU83/2 is needed as this board contains the call metering hardware. The
metering frequency, of 12 kHz or 16 kHz, is set when the board is activated.
4.10
PRIVATE TRUNK LINES (TIE LINES)
The tie lines can be analog, digital or H.323. See 4.6 Analog External Lines, TLU80 and
TLU83 on page 38 or/and see 4.4 Digital Extensions on page 36.