21/1531-ASP11301 Uen B3 2016-02-17 38
C
ONNECTION OF EXTERNAL CABLES
Figure 27: ELU31/4 - location of switch
4.6 ANALOG EXTERNAL LINES, TLU80 AND TLU83
Analog external lines are connected to analog TLU boards.
Figure 28: TLU8x - MDF example
4.7 DIGITAL EXTERNAL LINES
Note: If the ISDN T1 interface shall be connected outside the premises, it is mandatory
to connect the T1 lines via a Network Terminal 1 (NT1), Channel Service Unit
(CSU) or National Certified Terminal Equipment (NCTE) interface. This is
essential in order to comply with US and CA regulatory safety requirements in
force.
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