Communications Connections - Cisco Prisma II Installation And Operation Manual

Communications Connections

Chassis-to-Chassis ICIM Connections
The Prisma II platform allows the ICIM to be located in one chassis and control
application modules located in several other chassis. This communication "daisy-
chain" can be enabled by connecting cables to the ICIM IN and ICIM OUT
connectors located on the connector interface panel of the chassis. This connection is
required if an ICIM in one chassis is to communicate with or control any application
module located in a separate chassis.
Note: An ICIM can control a maximum of 140 modules. Depending on your
application, this is typically 6 or 7 chassis to a rack. Do not exceed these limits.
ICIM IN and ICIM OUT Connectors
Every Prisma II Chassis has a DB9 ICIM IN and a DB9 ICIM OUT connector for the
purpose of chassis-to-chassis ICIM connections. ICIM OUT is a male connector and
ICIM IN is a female connector.
ICIM IN and ICIM OUT Cables
The cable required for both ICIM IN and ICIM OUT connections is a standard "off
the shelf" serial extension cable, DB9 Female to DB9 Male. This cable can be
purchased at your local computer store or from Cisco.
The Cisco part number for a 6-foot DB9 Female to DB9 Male serial extension cable is
180143. The connectors are a serial 9-pin D-shell (EIA 574/232).
ICIM IN and ICIM OUT Cable Connection Procedure
To make chassis-to-chassis ICIM IN and ICIM OUT connections, follow these steps.
1. Connect the serial extension cable from the ICIM OUT of the chassis
containing the ICIM to the ICIM IN connector of the second chassis.
2. Connect a serial extension cable from the ICIM OUT of the second chassis to
the ICIM IN of the third chassis.
3. Continue this "daisy-chain" connection until all chassis are connected.
Notes: All chassis connected in this "daisy-chain" must be powered and have a fan
tray installed. A chassis that is connected but is either not powered, or does not
have a fan tray installed, will cause faulty operation of the ICIM.
All chassis connected in this "daisy-chain" must have a unique chassis ID number.
78-4006323-01 Rev C Installation 2-9