Nortel Networks DCT1900 manual Powering Base Stations via the Modular Cabinet

Technical Product Manual - DCT1900

Configuration Directions, Base Station Powering

Radio

Exchange

data pair

data pair

Local

Power

SC0

SC1

EPP

Base

Station

Fig. 4–1 Powering Base Stations by a remote Supply

4.3Powering Base Stations via the Modular Cabinet

Base Stations are powered via the following path:

zExternal source-MCCB-CLU/SLU-Base Station

Base Stations are connected to the CLU or SLU via an MDF by 2, 3 or 4 twisted pair cables. The maximum permissible length depends on the wire size and the number of pairs used between the MDF and Base Station. The CLU/MDF cable contains only one Express Powering Pair (EPP), but this may be doubled up on the MDF. Table 4–2 shows the maximum cable lengths.

4.3.1 –48V External Source Powering

Via an external -48V source, any configuration of cabinets and Base Stations can be powered as long as the power specifications of the external source are met. This method is suitable for any situation where PBX power is available (see Figure 4–2) or any other -48V supply with sufficient current capacity. The maximum cable lengths are given in Table 4–2 (42V and 48V column).

PBX

CAB	CAB	CAB	CAB
4	3	1	2

Fig. 4-2 Modular Cabinets powered by PBX

4-2	Config-DCT1900/R8/mw
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