10 51349:D
4/25/00
Unimode 2020/1010 Installation
Mechanical Installation
In a Unimode 2020/1010, the ADT-UZC-256 plugs into a slot on the ICA-4L chassis. If the
Unimode 2020/1010 is in an A-size cabinet (only one ICA-4L), the ADT-UZC-256 mounts
beneath the CPU or the SIB. If a second or third ICA-4L chassis is available, the
ADT-UZC-256 should be mounted in one of the two upper slots to permit easy access to
ADT-UZC-256 wiring and switch settings. Note that the ADT-UZC-256 mechanically
eliminates one LIB position, requiring the installation of an additional chassis in some
instances. As an alternative, the Unimode 2020/1010 may use a CHS-4 chassis to mount the
ADT-UZC-256 (see Figure 3 - 3).
Note also that the Unimode 2020/1010 does not require LIB boards to be installed in
consecutive positions. For example, in a five-loop system, the ADT-UZC-256 could be
installed in LIB position 3 (upper left of second chassis), with LIBs in all other slots. In this case,
the Unimode 2020/1010 would be programmed for loops 1, 2, 4, 5, and 6.

Figure 3-3: Mounting the ADT-UZC-256 in an ICA-4L Chassis