Aastra MX-ONE - Through-Connection on Power Failure or Processor Malfunction

Connection of External Cables
6.7.2.2 Digital external lines with TLU79 and an NT1-box, Network Terminal-box
Figure 100 2-wire ISDN with TLU79 and an NT1-box (8 pairs)
Note: Make sure that each individual’s receive (Rx) and transmit (Tx) are
properly connected between the TLU79 board and the NT1-box.
Necessary corrections between the individuals can preferably be
performed in the MDF.
6.7.2.3 Digital external line with TLU79 as a tie line
Figure 101 Connecting TLU79 to TLU79 through MDF (8 pairs)
6.8 Through-Connection on Power Failure or Processor
Malfunction
If the exchange is equipped with an FTU2 board, one to 32 extensions (8 per
FTU2 boards) can be through-connected to the public network in the event of
power failure or processor malfunction.
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6/1531-ASP 113 01 Uen J2 2008-07-17