Hssi Connections - Cisco 7000 Series Hardware Installation And Maintenance Manual

Connecting Interface Cables
Figure 3-22

HSSI Connections

The HIP HSSI port functions as a DTE when it is connected to a DSU for a standard HSSI
connection, and it can also be connected to a collocated router with a null modem cable.
To connect the router to a HSSI network, use a HSSI interface cable between the HIP port and the
DSU. Both ends of the HSSI interface cable are the same, so you can connect either end to the HIP
or DSU. (See Figure 3-23.)
Figure 3-23
network
To connect two routers back to back in order to verify the operation of the HSSI port or to build a
larger node, use a null modem cable between available HSSI ports in two separate routers. The two
routers must be in the same location, and can be two Cisco 7000 series, two AGS+'s, or one of each.
When you configure the ports, you must enable the internal transmit clock on in the HSSI interface
in both routers with the command hssi internal-clock. To negate the command when you disconnect
the cable, use the command no hssi internal-clock. For complete command descriptions and
instructions, refer to the related software documentation.
3-24 Cisco 7010 Hardware Installation and Maintenance
Replacing Standard 4-40 Thumbscrews with M3 Metric Thumbscrews
HSSI Network Connection
HIP
To
T3, E3, or
SONET DSU