COMSPHERE 3000 Series Carrier
If modular devices are installed in the same carrier as
If your carriers are equipped with DSUs with DBMs, dial/lease modems, or modems having dial backup capability, the half of the carrier containing those devices must have a Network Interface Module (NIM) installed to provide a dial network or switched 56 kbps digital service interface. Since one module serves eight slots, it is best to group units with dial capability.
NIMs can be installed at the rear of the carrier. There is a total of nine different NIMs available.
The carrier's backplane contains connectors which automatically engage mating connectors on DSUs (and TDM or MCMP circuit cards, if installed) or dial/lease modems when they are installed. To prevent accidental contact with these connectors, use filler panels for unfilled slots. Verify that you have ordered a sufficient quantity.
To use 3151 CSUs or 3161 DSU/CSUs in the carrier, you must remove any rear connector plates or modules and add the 3151/3161 Auxiliary Backplane. Using a single Auxiliary Backplane, you can install any combination of up to eight 3151 CSUs and 3161 DSU/CSUs on one side of the 3000 Series Carrier, and up to eight 3600, 3800, and 3900 Series devices on the other side of the carrier. Alternatively, using two Auxiliary Backplanes, you can install up to sixteen 3151 CSUs or 3161 DSU/CSUs in a single 3000 Series Carrier.
For each
installed in the carrier, determine whether the circuit card is to be used as a Time Division Multiplexer (TDM) or as a digital bridge. A TDM interface cable is supplied with each
For modular TDM or MCMP circuit cards, use standard cables for Ports 1 through 6. However, a
It is recommended that you do not perform any procedure that removes power to the carrier (for example, replacing the power transformer unit or disconnecting power to the power transformer to install an SDCP in a fully configured carrier) during peak operating hours since disconnecting power disables all units in the carrier.
December 1994 |
