Routing And Connecting Electrical Cables For Pcm Interfaces - Eci Telecom NPT-1020 Installation And Maintenance Manual

NPT-1020 Installation and Maintenance Manual
4.9.6 Routing and Connecting Electrical Cables for PCM
Interfaces
This section describes the connection of PCM interface electrical cables to the VDF and ICPs.
4.9.6.1 Routing and Connecting Electrical Cables for PCM Interfaces to
the VDF
Each type of SM_10E/EM_10E traffic module uses a SCSI-36 connector for its external interfaces. An
electrical cable with a SCSI-36 connector on one end and another end that is open is used to connect each
SM_10E/EM_10E traffic module to its corresponding Voice-Frequency Distribution Frame (VDF), if ICPs are
not installed.
To connect PCM traffic cables to the VDF:
1. Arrange the PCM traffic cables and route them to the rack side rails.
2. Pull each PCM traffic cable down to the level of the SM_10E/EM_10E card.
3. Bend the cable and thread it through the side cable guides of the rack and through the appropriate
opening near the shelf until the cable connector is positioned against the appropriate place. Use cable
ties as required to fasten the cable to the rack side rails.
4. Use a cabling diagram of the site to associate the SM_10E/EM_10E traffic module connectors with the
appropriate VDF connections.
5. Connect the cable connector to the corresponding connector on the SM_10E/EM_10E traffic module
front panel.
C
AUTION: Do not exert excessive tightening torque to secure the cable connector, as this may
damage the SM_10E/EM_10E traffic module.
6. Secure the cable connector to the SM_10E/EM_10E traffic module connector with the cable
connector screws. Tighten the screws manually. If you cannot reach the screws with your hands, use
an adjustable-torque flatblade screwdriver (maximum blade size is 0.6). Set the tightening torque to
40 N cm to 44 N cm.
4.9.6.2 Routing and Connecting Electrical Cables for PCM Interfaces to
ICPs
To ease installation and connection to customer termination equipment, three types of ICPs were
developed. An electrical cable with SCSI-36 connectors on both sides is used to connect an ICP to its
corresponding SM_10E/EM_10E traffic module. The same cable is used for any type of ICP.
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