Field cross-connecting module КР 351
Field cross is designed to ensure the connection of lines of end user devices of different types of communication (telephone, telegraph, etc.) in stationary and field communication systems as part of subscriber networks of automatic and manual switching systems.
The field cross has no built-in power sources and does not require the connection of external power sources.
Field cross provides protection of subscriber lines (each separately) from overvoltages and excessive electrical currents, the effects of lightning discharges.
The composition of the field cross includes:
– field cross-connecting module КР 351.
– cable for direct connection to a digital automatic switching system (DASS).
The design of the field cross consists of a sealed lower compartment and cover. In the closed state, the lid is fixed with a lock. On the cover of the field cross is fixed carrying handle.
The field cross is designed for the deployment of subscriber networks of field hardware (stations) communication and is an auxiliary branching device.
| Parameter | Value |
| Field cross provides: | |
| connect up to ten two-wire or up to five four-wire subscriber lines with a P-274M cable or similar to the equipment room (station) using the PТRК 10×2 field cable | |
| transit of two groups of five two-wire lines or two four-subscriber subscriber lines, each using a field cable PТRК 10×2 from the station side (AL-10 hardware coupling half) and two 5×2 PТRК field cables from the subscriber side (hardware coupling half AL1-5 and AL5 -10). | |
| Cross operated in climatic conditions: | |
| ambient temperature: | from minus 35º to plus 50º С |
| relative humidity: | no more than 98% at a temperature of 25º С |
| atmosphere pressure: | from 450 to 850 mm hg. art. |
| Overall dimensions of the field cross, taking into account connectors for connecting field cables: | 200х200х140 mm. |
| Field cross mass not more than: | 3 kg. |
