Datasheet

Installing 2T16S Network Processor Modules in the Cisco 4000 Series

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When you face the front of the chassis, the three LEDs (labeled OK) on the lower left correspond to the

three network processor modules, if present. (See Figure 2.) When on, these LEDs indicate that the

network processor modules are operational. The upper LEDs (labeled DATA) blink to indicate network

activity on the respective interfaces. If no network processor module is installed in a slot, the LEDs

corresponding to that slot will be off.

The LED labeled POWER goes on to indicate that the system power is on. The LED labeled OK goes on

to indicate that the system’s processor is working.

The network processor module LEDs are visible through the cutouts in the rear of the chassis.

Reading 2T16S Network Processor Module LEDs

The 2T16S network processor module has one green LED per port, each of which indicates Connect

status. All LEDs momentarily light up during reset as a ‘lamp test’ feature. The LEDs indicate the

following signals: DSR, DTR, DCD, RTS, and CTS. The Connect status is the logical operand AND for

all listed modem control signals. In DTE mode, Connect is DSR, DCD, and CTS. In DCE mode, Connect

is DTR and RTS.

2T16S Network Processor Module Port Information

The 2T16S network processor module for Cisco 4000 series routers provide 2 high-speed serial ports

and 16 low-speed serial ports. Each high-speed serial port supports one of nine cable types:

• EIA/TIA-232, DTE or DCE

• V.35, DTE or DCE

• X.21(NRZ/NRZ1), DTE or DCE

• EIA/TIA-449, DTE or DCE

• EIA-530A, DTE

The low-speed serial ports support an octal cable. The eight legs of each octopus cable are all DTE or

all DCE. ( Table 1 on page 6 shows port configurations.)

• 2T16S-RS232 low-speed ports require EIA/TIA-232 octal cables

• 2T16S-V.35 low-speed ports require V.35 octal cables

• 2T16S-X.21 low-speed ports require X.21 octal cables

• 2T16S-232V.35 low-speed ports require V.35 octal cables (upper connector) and EIA/TIA-232

(middle connector)

• 2T16S-232X21 low-speed ports require X.21 octal cables (upper connector) and EIA/TIA-232

(middle connector)

For information about cables that connect to the low-speed serial ports, see the sections “Low-Speed

Serial Cables,” page 24 or “High-Speed Serial Cables,” page 21. For pinout descriptions, see the section

“Cabling Specifications” in the Cisco 4000 Series Installation Guide. Although the printed manual ships

with your router, the most current version appears on the on the World Wide Web at

http://www.cisco.com and on the Documentation CD that ships with your router.

Information in this section includes port specifications, throughput, distance limitations, and

connections.