Cisco 3640 Multiservice Platform
Still assembling my 3640. and awaiting some books. If you want to contact ME, it won't do you much good.

Cisco 3600 Series Routers Hardware Installation Guide
Installing Power Supplies in Cisco 3600 Series Routers
Installing the Grounding Lug on Cisco 2600 and Cisco 3600 Series Routers
Rack or Wall-Mounting Cisco 3600 Series Routers and the Redundant Power System
Upgrading System Memory in Cisco 3600 Series Routers
Cisco 2600 and 3600 Hints and Tricks
Cisco 3620 and Cisco 3640 Router Quick Start Guide
Center-Mount Bracket Installation Guide for Cisco 3640 Series Routers
Password Recovery Procedure for the Cisco 3600 and 3800 Series Routers
Auxiliary Port, Console Port, And Adapter Pinouts For Cisco 1000, 1600, 2500, 2600, And 3600 Series Routers
Cisco 3600 Series Router Architecture
Cisco RPS Hardware Installation Guide

CR1 PCMCIA Slot 0 and 1 LEDs
CR7, 8 Board LEDs (diags? Status?)
J1 AUX 115Kb/s
J2 CON 115Kb/s
J3 BAUD RST - Baud Reset
J4 Dual PCMCIA socket
J6 Board Reset outline
J7 ENV MON (Env Monitor??)
J8 IO_Bus CTL outline
J9 IODATA P..15 outline
J10 GT A CTL outline
J11 R4600 CTL
J12 Watchdog Disable outline
J19, 21 Riser Header
J20. 22 Riser header
J23 RPS (Redundant Power Supply)
J24 Status LED
P1 Test?
P2 Board power
P3 NM header
P4 NM Header
PCI Test outlines
Status Active or Ready LEDs
U2 NS PC16552DV Dual UART w/FIFOs
U14 IDT 79R4700-100DP
U18-21 DRAM 72 pin 60nS (Tin Lead)
U23, 24 Flash
U27 ROM 128/256/512
U28 NVRAM M48Z128Y-85PM1
U42 Unk - heat sink
U43 intel SPD6729QCE PCI-to-PC Card Controller
U50,51,53 Digital 21052-AB PCI-to-PCI bridge
Y1 3.6864 MHz osc
Y2 50.0000 MHz osc

J3 BAUD RST - Jumper J3 on the motherboard of the Cisco 2600 and 3600 Series Routers controls the speed reset. The factory default position of the shunt shorts pins 2-3. When the shunt is moved to pins 1-2, the console is reset to 9600 baud on the next power cycle. The following figures show the location of the console reset jumper, labeled DUART_RST or BAUD_RST.

 72 pin SIMMs, 60nS speed, Tin leads. Both non-parity and parity SIMMs supported. Just to be simple, all one type or the other...
• Cisco 3640: Supports either 32- or 64-bit operation. Router performance is approximately 20 percent slower in 32-bit mode than in 64-bit mode. To use 64-bit mode, you must install DRAM SIMMs in pairs of the same size. Generally, basic software feature sets (such as IP) use 32-bit DRAM SIMMs and robust software feature sets (such as Enterprise) use 64-bit DRAM SIMMs.

NOTE: I dimly remember a snippet that the 3640 will support parity if both SIMMs in a bank are parity. If not, the bank will be treated as non-parity {Ed}.

Follow these rules to use 64-bit operation:
• SIMMs in banks 0 and 1 must:
– Same size (in megabytes)
– Have the same access time (in nanoseconds).
• SIMMs in banks 2 and 3 must:
– Same size (in megabytes), and the same size or smaller than those in banks 0 and 1
– Have the same access time (in nanoseconds)

3640 Front View

The main difference between the console and auxiliary ports is that the auxiliary port supports hardware flow control and the console port does not. Because the auxiliary port supports flow control, it is ideally suited for use with the high-speed transmissions of a modem. Console terminals transmit at slower speeds than modems; therefore, the console port is ideally suited for use with console terminals.

System LED
Color Description
Off Router is not receiving power.
Blinking green Router is running the ROM monitor. No errors detected.
Solid green Router is operating normally. No errors detected.
Amber Router is receiving power but not functioning properly. Possible POST error or over-temperature condition detected.
Alternating amber and green Power-on self-test detected. The router is attempting to reload the ROM monitor.


Color RPS Status
Off Not installed.
Blinking green RPS and power supply are both on. Choose only one by:
•  Unplug power supply and use the RPS.
•  Turn off RPS and use power supply. RPS can remain connected.
Solid green Operational.
Installed but not operational

ACTIVE, READY, and PCMCIA LEDs in Cisco 3640 Routers

LED Description
ACTIVE 0, 1, 2, 3, 4, 5, 6
Blinks to indicate network activity on the module installed in the indicated slot.
READY 0, 1, 2, 3, 4, 5, 6 Functional module installed in indicated slot. If LED is off, slot is empty or module is not functional.
PCMCIA 0, 1 Data activity on the indicated PCMCIA slot.