Figure 2-22 Dual Serial Network Processor Module Jumpers, J4 And J5-Nrzi Setting; Figure 2-23 Router Serial Cable Connections - Cisco EF4116 Hardware Installation And Maintenance Manual

If the network processor module is operating as DTE in NRZI mode, the sense of the
dte-invert-timing command must be manually changed. For instance, if the command
no dte-invert-timing was previously entered in the configuration file, then dte-invert-timing must
be configured for the module to operate as DTE in NRZI mode.
To set the jumpers for NRZI, move the jumpers to the position shown in Figure 2-22 using the
orientation shown in Figure 2-21.
Figure 2-22 Dual Serial Network Processor Module Jumpers, J4 and J5—NRZI Setting
J5 J4
Pin 1
Port 1 Port 0
You must use a special serial cable to connect the router to a modem, CSU/DSU, or other device as
shown in Figure 2-23. This cable, available from your customer service representative, is normally
ordered with the system. See the appendix "Cabling Specifications." Nine different serial cables are
available for the two versions of serial modules: both DTE and DCE versions of V.35, EIA/TIA-232,
EIA/TIA-449, and X.21; and EIA-530 DTE. Note that the cables for the two versions are not
interchangeable.
Figure 2-23 Router Serial Cable Connections
Serial port
50-pin connector
Chassis
Note Serial ports configured as DCE must also be configured with the clockrate command. An
error message will be generated if there is a mismatch between the cable and the software
configuration of the port—for example, if the cable is DTE and the clock rate is set, or if the cable
is DCE and the clock rate is not configured. For more information on software commands, refer to
the software publications.
Serial transition
EIA/TIA-232, EIA/TIA-449, V.35,
X.21, or EIA-530 connector
Network Connection Considerations
cable
Modem
or
CSU/DSU
Preparing for Installation 2-21