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Port Adapter Overview
PA-2H Dual-Port HSSI Port Adapter Installation and Configuration
1-2
The HSSI port adapter conforms to BABT/TC/130 and EIA/TIA-612 and EIA/TIA-613 standards
for HSSI. PA-2H provides two interfaces. Each interface provides a full-duplex synchronous serial
interface for transmitting and receiving data at rates of up to 52 megabits per second (Mbps).
The HSSI, which was recently standardized as EIA/TIA 612/613, provides access to services at T3
(45 Mbps), E3 (34 Mbps), and Synchronous Optical Network (SONET) STS-1 (51.82 Mbps) rates.
The actual rate of the interface depends on the external DSU and the type of service to which it is
connected.
The port adapter supports both 16- and 32-bit cyclic redundancy checks (CRCs). The default is
16-bit CRCs; to enable 32-bit CRCs, you use a configuration command. (For a description of the
CRC function, refer to “Chapter 7, “Cable Installation and Interface Configuration.”
Note While the VIP2 and Catalyst RSM/VIP2 supports online insertion and removal, individual
port adapters do not. To replace port adapters in the Cisco 7000 series and Cisco 7500 series routers,
and the Catalyst 5000 family switches, you must first remove the VIP2 or Catalyst RSM/VIP2 from
the chassis, then replace port adapters as required. Online insertion and removal is supported for port
adapters in the Cisco 7200 series and Cisco uBR7200 series routers.
The BABT605559 marking on the HSSI port adapter signifies that the port adapter meets United
Kingdom directive 605559 and has been designed to BABT/TC/130 standards. The BABT label is
located on the top of each HSSI port adapter (PA-2H). Figure 1-2 shows the BABT label.
Figure 1-2 BABT Label for the HSSI Port Adapter
Note PA-2H has been updated to Revision B (Rev. B).
The newest dual-port HSSI port adapter can be identified by Rev. B in the lower right corner of its
front-panel label (see Figure 1-1). The older dual-port HSSI port adapter does not have Rev. B on its
label (see Figure 1-3). (For specific information on software and hardware compatibility, refer to
Chapter 2, “Preparing for Installation.”
Figure 1-3 Older HSSI Port Adapter (Pre-Rev. B)
To determine which dual-port HSSI port adapter you currently have installed, examine the
front-panel label or, use the show diagbus command. (For information on using the show diagbus
command, refer to Chapter 7, “Cable Installation and Interface Configuration.”)
H7823
605559
ENABLED
0
TD
1
TC
RD
RC
LB/C
0
1
HSSI
H7443