Ddf 21 E1S Unit; Assembling The Ddf; Figure 5-11: Ddf General View - Eci Telecom NPT-1020 Installation And Maintenance Manual

NPT-1020 Installation and Maintenance Manual
Right lower support rail outer hole, near the rear panel.

Right upper support rail inner hole, near the front.

5.6

DDF 21 E1s Unit

The DDF unit supports connection of up to 21 E1 lines. The terminal blocks connect the equipment side and
the customer's E1 interfaces. The unit is 1U high and can be installed in ETSI or 19" racks using reversible
brackets.
The DDF is equipped with five connection blocks, each supporting connection of five full E1 lines (transmit
and receive). The block can also be wired to serve only transmit or receive lines (total ten lines).
The rear side of the DDF tray includes a cable tie comb that facilitates cable wiring. In addition, several
cable retainers on the DDF tray help keep wire routing and connection neat.
The connection blocks are attached to bushings located in front of the DDF tray.

5.6.1 Assembling the DDF

The DDF comes dismantled and must be assembled in the field. Assembling includes the following steps:
1. Installing the reversible mounting brackets
2. Attaching the connection blocks
5.6.1.1 Installing Mounting Brackets
The DDF has reversible brackets that by default are assembled for 19" rack installation. If your installation is
in a 19" rack, skip this procedure.
ECI Telecom Ltd. Proprietary

Figure 5-11: DDF general view

NPT-1020 Wall-Mounted Installations
5-11