26 Second-Generation Channel Interface Processor (CIP2) Installation and Configuration
What Is the CIP2
ESCON and Bus and Tag Specifications
Table 3 lists the specifications for the ESCON and bus and tag interfaces.
Table 3 ESCON and Bus and Tag Specifications
ESCON Cable
The ECA interface uses 62.5/125 micrometer, multimode, fiber-optic cable with male duplex
connectors at each end. (See Figure 13.) ESCON cables are not available from Cisco Systems. Refer
to the ESCON specifications in Table 3, and contact your cable supplier or the vendor of your host
CPU to order the correct ESCON cable.
Figure 13 ESCON Interface Duplex Connector for the ECA
1. The IBM 3044 C/D (host side/remote side) copper-to-fiber repeater can be used to extend this distance up to 1.2 miles (2 km).
2. MBps = megabytes per second.
3. For bus and tag, the signaling rate matches the channel data rate. For example, if you use a 3.0 MBps channel, the signaling rate is
3.0 MBps. The ESCON interface signals at a constant rate; the bus and tag interface signals at the data rate.
4. Mbps = megabits per second.
5. The CIP2 ESCON requires dynamic = NO with HCD.
6. Where 256 represents available unit addresses, 16 represents the number of partitions (LPARs), 16 represents the number of control
unit images, and 253 represents the number of ESCON director paths. It is unlikely a system would have the resources to support the
total number of available addresses.
Characteristic ESCON Bus and Tag
Supported processor I/O architectures ESA/390 System/370
370/Xa
ESA/390
Bit transmission Serial Parallel
Maximum distance (for LED with ESCON) 1.9 miles (3.1 km) point-to-point
5.7 miles (9.2 km) with two ESCON Directors
400 ft (122 m)
1
Channel data rate Up to 17 MBps
2
Up to 4.5 MBps
Signaling rate
3
200 Mbps
4
4.5 MBps
Cable types Fiber-optic (62.5/125 micron multimode) Copper bus and tag
Addition of devices to running systems Dynamic
5
Static
Number of addressable devices per channel 256 x 16 x 16 x 253
6
256
Connectable control units per channel Up to 59 (through a 9032 ESCON Director) Up to 8
Connectable channels per adapter Up to 59 (through a 9032 ESCON Director)
Varies by control unit
1
H2454
