Toshiba CIX670 Remote Expansion Cabinet

A CIX670 Expansion Cabinet can be located up to three kilometers (1.86 miles) from its Base

Cabinet. Remote Expansion Cabinets are enabled by the RRCU circuit card. One RRCU connects to up to two ribbon-type Data Cables and applies the inter-cabinet signal to a multi-mode fiber-

optic pair. One fiber pair can support one or two Expansion Cabinets in one remote location using one RRCU in the Base Cabinet and another in the Remote Expansion Cabinet.

The CIX670 Base Cabinet supports up to six Remote Expansion Cabinets (at least one RRCU circuit card is required for each remote location).

Remote Cabinets support the BIOU for external Page Zones, Night Bell, etc., and all CO line and trunk interface circuit cards. Network clock synchronization can only be derived from digital trunks installed in the Base Cabinet (Master) location.

A Remote Cabinet can support all circuit cards that can be installed in a local Expansion Cabinet, including digital trunk cards. However, the system cannot derive network clock synchronization from a digital trunk installed in a Remote Cabinet. This requires a digital trunk installed in the Base Cabinet or in a local Expansion Cabinet connected to the Base by a standard ribbon cable. For each Remote Cabinet location, local trunks may be required for correct 911 service.