COMSPHERE 3000 Series Carrier
Figure 3-35. Modular DSU-TDM or DSU-MCMP and Connector Module
Connector modules have six ports (labeled Port 1 through Port 6). Each port is a 25-pin connector which provides the EIA-232 DTE interface. In addition, a 26-pin high-density D-type connector is located at the top of the connector module and provides the V.35 interface for either Port 1 or an aggregate data path. This connector requires a 6-port V.35 interconnect cable (supplied by the customer), which converts the 26-pin high-density D-type interface to the standard 34-pin V.35 interface. Connector modules allow removal of a modular DSU-TDM or DSU-MCMP circuit card without disconnecting the DTE cables.
When non-modular DSUs are installed in the same carrier with non-modular dial/lease modems, group dial/lease modems together and install them starting from the left (in Slot 1) before installing the DSUs. However, if modular circuit cards are installed in the same carrier as non-modular circuit cards, the modular circuit cards must be installed to the left of all other devices in the carrier.
Before you install Model 3151 CSUs or Model 3161 DSU/CSUs in a carrier, you must first install an Auxiliary Backplane, as described in the Auxiliary Backplane Installation section earlier in this chapter. Figure 3-36 shows the Models 3151 and 3161 circuit cards.
The next five sections contain the following information:
•Preinstallation information.
•Procedure for installing modular circuit cards and DTE connectors (rear connector plates and connector modules).
•Procedure for installing non-modular circuit cards.
•Procedure for installing 3151 and 3161 circuit cards.
•Procedure for installing filler panels.
3-48 | December 1994 | 3000-A2-GA31-80 |
