Paradyne 3000 manual Installation Planning

Installation Planning

One COMSPHERE 72-inch cabinet can accommodate up to six COMSPHERE 3000 Series Carriers. A cabinet does not need to be fully populated with carriers, however. There are several general rules to follow during installation of the carrier.

1.If installing multiple carriers, install the lower one first, and if installing a full cabinet of carriers, install the carriers from the bottom of the cabinet and work up. This provides the following:

a.Proper alignment for subsequent carriers.

b.Easier carrier installation since they can be placed in the mounting and lowered onto the mounting screws.

c.Easier connection of the DTE interface.

d.Proper cabinet balance. Bottom-up installation keeps the cabinet from becoming top heavy.

2.You must mount carriers when they are empty.

If a carrier is installed in an EIA standard 23-inch (wide) cabinet, however, the mounting brackets on the carrier must be reversed before the carrier is mounted. Carriers can be installed in either EIA standard 19- or 23-inch (wide) cabinets.

Models 3551, 3611, and 3616 DSUs and Models 3811 and 3911 dial/ lease modems within the COMSPHERE 3000 Series Carrier(s) can be managed from an SDCP, a Network Management System (NMS), or both. Remember that the Models 3551, 3611, and 3616 DSUs and Models 3811 and 3911 dial/lease modems are managed by the 6700 or 6800 Series NMS. A COMSPHERE 3000 Series Carrier cannot be connected to both a 6700 Series NMS and a 6800 Series NMS at the same time.

The location of the SDCP within the cabinet should be determined ahead of time. It should be installed at a convenient level, usually at eye-level. In a fully configured cabinet, this would be the fourth or fifth carrier from the bottom. Note that the Model 3511 DSUs are not capable of being managed by an SDCP.

The alarm output connection is closed, activating the customer-supplied alarm, when any DSU or Model 3811 or 3911 dial/lease modem in the carrier has an alarm condition that lights the red Alrm LED of the DSU or modem. For information on how to connect the alarm output, see the Alarm Output Connection section in Chapter 3.

Up to eight carriers can be controlled by an SDCP, but there must be a Shared Diagnostic Unit (SDU) installed in each carrier. (Slot 0 in each carrier is reserved for the SDU.) The SDU provides the interface that connects the SDCP to other carriers. Cabling is required that daisy chains these interfaces together.

If the units in the carriers are to be managed from an NMS, an SDU is required in all carriers. Up to eight carriers can be daisy chained together.

Cooling requirements should be given consideration. Depending upon the number of units in the carrier and how they are equipped, a fan module may be recommended. Table 3-1 in Chapter 3 will help you determine whether or not you need additional cooling for your carrier.

Two 50-pin connectors (P21 and P22) at the rear of the carrier, each serving eight slots, provide the digital interface for DSUs and the analog leased-line interface for dial/lease modems. DSUs and dial/lease modems can be placed in the same carrier, but they should be grouped together, (e.g., eight DSUs with a digital interface and eight dial/lease modems with an analog leased-line interface).

3000-A2-GA31-80 December 1994 2-3