Serial Connections; Connecting Dte And Dce Devices - Cisco 7000 Series Hardware Installation And Maintenance Manual

Connecting Interface Cables
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Serial Connections

All FSIP ports support any available interface type and mode. The serial adapter cable determines
the electrical interface type and mode of the port to which it is connected. EIA/TIA-232,
EIA/TIA-449, V.35, and X.21 interfaces are available in DTE mode with a plug at the network end
and in DCE mode with a receptacle at the network end. EIA-530 is available only in DTE mode with
a plug. For descriptions and illustrations of each connector type, refer to the section "Serial
Connection Equipment" in the chapter "Preparing for Installation." For cable pinouts, refer to the
appendix "Cabling Specifications."

Connecting DTE and DCE Devices

When connecting serial devices, consider the adapter cables as an extension of the router for external
connections; therefore, use DTE cables to connect the router to remote DCE devices such as modems
or data service units (DSUs), and use DCE cables to connect the router to remote DTE devices such
as a host, personal computer (PC), or another router. (See Figure 3-20.) The optional or additional
connection equipment required depends on the interface type of each port.
Figure 3-20
FSIP
Note
port. When connecting a remote DTE device (which means that the FSIP port is a DCE interface),
you must set the clockrate with the clockrate command. For an example configuration using this
command, refer to the section "Configuring Timing (Clock) Signals" in the chapter "Maintenance."
For complete command descriptions and instructions, refer to the related software configuration and
command reference documentation.
3-22 Cisco 7010 Hardware Installation and Maintenance
Connect the bypass switch control cable. If the control cable on your optical bypass switch uses
a mini-DIN connector, connect the cable directly to the mini-DIN optical bypass port on the FIP.
If the switch uses a standard DIN connector, use the optical bypass adapter cable (CSB-FMDD)
supplied with each FIP. Connect the DIN end of the adapter cable to the DIN on the control cable,
and connect the mini-DIN end of the adapter cable to the mini-DIN bypass port on the FIP.
Serial Port Adapter Cable Connections
CSU
DSU
The serial port adapter cable determines the electrical interface type and mode of the FSIP
V.35 cable
E1-G.703/G.704,
EIA/TIA-232, EIA/TIA-449,
EIA-530, or X.21 cable