Installing the Router 3-23
Connecting Interface Cables
Caution The early serial interface processor for the seven-slot Cisco 7000 model, known as the SIP,
SX-SIP, or PRE-FSIP, does not operate in the Cisco 7010. (The SIP requires SxBus connectors that
are not present on the Cisco 7010 backplane.) The SIP and FSIP each use unique interface cables
that are not interchangeable. (The SIP uses DB-15 or DB-25 plugs and receptacles; all FSIP ports
are 60-pin receptacles and the cables use 60-pin plugs.)
Also, the backshell on the FSIP universal cable connector is not stiff enough to prevent you from
inserting the interface cable connector into the FSIP port upside down. Before forcing the cable into
the FSIP port receptacle, ensure that the connector is oriented correctly. Forcing a SIP cable into an
FSIP port or forcing an FSIP cable into the port upside down can damage the FSIP. (See
Figure 3-21.)
Figure 3-21 SIP and FSIP Cables Are Not Interchangeable
Connecting to Metric-Based Devices
A pair of metric thumbscrews is included with each port adapter cable except V.35. If you will
connect serial cables to a remote device that uses metric hardware, replace the standard 4-40
thumbscrews at the network end of the cable with the M3 thumbscrews.
To remove thumbscrews, use the flat side of a large (1/4-inch) flat-blade screwdriver to push the tip
of the screw into the connector housing and out the other side. (See Figure 3-22.) If the screw resists,
use pliers to pull it out. Insert the new thumbscrew and push it into the connector housing until it
pops into place.
H2170
Router port FSIP Cable
FSIP serial
interface cable
FSIP serial
interface cable
Correct
Incorrect, cable upside down
Router port SIP cable
SIP serial
interface cable
Incorrect, wrong cable
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