Alarm Cables; Management Cables; Timing (Clock) Cables - Eci Telecom NPT-1020 Installation And Maintenance Manual

NPT-1020 Installation and Maintenance Manual
The recommended cable gauge is 25 mm
rack power cable does not exceed 2 V, even for cable runs of maximum 30 meters connected to a RAP and
providing power to multiple NPT-1020 platforms.
When the RAP is used to provide power to a single NPT-1020 platform, lower-lead gauges may be used, as
follows:
For runs not exceeding 20 meters, use 10 mm

For runs not exceeding 30 meters, use 16 mm

3.5.2.2 Platform Power Cables
One 12 AWG cable, supplied by ECI, connects the input power from the rack RAP unit to the POWER IN
connector on each INF-1020 module of each NPT-1020 platform installed in the rack.

3.5.3 Alarm Cables

Alarm cables used within NPT-1020 equipment are included in the shipment according to the site
specifications.
The alarm indications are carried by the shelf alarm indication cable. One shelf alarm indication cable is
required for each NPT-1020 shelf installed in the rack. This cable connects between the ALARM connector
on the NPT-1020 and one of the ALARMS connectors on the RAP (RAP-4B only). Cable length is 2.0 m.
N
OTE: There are no ALARMS connectors on the RAP-BG.

3.5.4 Management Cables

Out-of-band management traffic is connected to a NPT-1020 platform via the RJ-45 (MNG) connector
located on the front panel of the NPT-1020.
The MNG Ethernet connector is wired as a 10BaseT station port for direct connection through an
RJ-45-to-RJ-45 straight cable to a port of a 10BaseT Ethernet hub.
Suitable standard Ethernet station cables are available from many sources. Cables of Category 5 or better
must be used. In all cases, the length of the cables must not exceed the maximum recommended for the
cable type and hub port in use (up to a few dozen meters).

3.5.5 Timing (Clock) Cables

The NPT-1020 platform uses an RJ-45 connector on the front panel that integrates the two timing reference
interfaces (2 x T3 and 2 x T4). If it has balanced (120 Ω) G.703 interfaces, a multi twisted-pair cable with an
RJ-45 connector (supplied by ECI) is used to connect timing signals from the NPT-1020 to the site timing
reference distribution subsystems.
If the site timing reference distribution subsystem has unbalanced (75 Ω) G.703 interfaces, configure an
adapter with coaxial cables that provides balanced-to-unbalanced conversion (supplied by ECI).
ECI Telecom Ltd. Proprietary
or thicker. This gauge ensures that the voltage drop across the
²
copper leads.
2
copper leads.
2
Before You Start
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