Datasheet

Installing 2T16S Network Processor Modules in the Cisco 4000 Series

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The adapter cable also determines the electrical interface type and mode (DCE or DTE) of the port to

which it is connected. Because the low-speed serial ports require special adapter cables, we recommend

that you obtain serial interface cables from Cisco Systems (contact Customer Service at 800 553-6387,

408 526-7208, or cs-rep@cisco.com).

Note The eight legs of each octopus cable are all DTE or all DCE, and they must all be the same interface type

(EIA/TIA-232, V.35, X.21, mixed EIA/TIA-232 and V.35, or mixed EIA/TIA-232 and X.21) as the

module interface type (NP-2T16S-RS232, NP-2T16S-V.35, or NP-2T16S-X.21, NP-2T16S-232V35, or

respectively NP-2T16S-232X21). You cannot mix DTE/DCE and interface types within a cable; the

low-speed serial ports are not Cisco serial 5-in-1 serial ports.

The low-speed serial port specifications are as follows:

• Supports synchronous speeds up to 128 Kbps, full duplex

• Supports asynchronous speeds up to 115.2 Kbps, full duplex

• NRZ, NRZI encoding/decoding

• DCE/DTE mode

• Full/half duplex

• Supports EIA/TIA-232, V.35, and X.21 interfaces

• 200-pin Cisco standard connector; configuration determined by transition cable type

For most interface types, the adapter cable for DTE mode uses plugs at the network end, and the cable

for DCE mode uses receptacles at the network end. The exception is the V.35 adapter cable, which is

available with either V.35 plugs or receptacles for either mode. The mode, DCE or DTE, is labeled on

the molded plastic connector shell at the ends of all cables except V.35 (which uses the standard

Winchester block-type connector instead of a molded plastic D-shell).

Following are the available interface cable options for the mode and network-end connectors for each

cable:

• EIA/TIA-232: DTE mode with DB-25 plugs; DCE mode with DB-25 receptacles

• V.35: DTE mode or DCE mode with 34-pin Winchester-type V.35 plugs; DTE mode or DCE mode

with 34-pin Winchester-type V.35 receptacles

• X.21: DTE mode with DB-15 plugs; DCE mode with DB-15 receptacles

Caution For proper router operation, both ends of the EIA/TIA-232 serial DCE cable, and any cables attached to

it, must be connected. If you must detach this cable, detach the router end first. If the end away from the

router is disconnected, the line connection will “flap.” The interrupts generated from such a condition

could cause the router to shut down.

Clocking and Aggregate 2T16S Network Processor Module Throughput

The following configuration requirements must be met for proper operation of the 2T16S module:

• The maximum aggregate throughput of the module is 11.7 Mbps.

• No high-speed port can be clocked at a rate higher than 2.048 Mbps synchronous full duplex or

4 Mbps synchronous half duplex.

• All 16 low-speed serial ports can run simultaneously up to 115.2 Kbps full duplex with no

restrictions.