3com Netbuilder II CEC Console Port

CEC
AMD 29000 RISC main processor
CEC - 25MHz, 12MB total, 4 MB data memory, 4 MB instruction memory, and 4 MB shared (packet) memory
CEC 20 - 25 MHz 20MB total, 8 MB data memory, 8 MB instruction memory, and 4 MB shared (packet) memory

AMD 29040 RISC main processor
DPE 40 - 50 Mhz 32MB/16MB The DPE 40 cannot be upgraded to a DPE 80 (?)
DPE 80 - 50 Mhz 64MB/16MB
DPE plus 62.5 MHz 64MB/16MB

DPE 40 32 MB (upgradeable to 64 MB) of instruction and data memory and 8 MB of shared (packet) memory.
16 MB 72-pin SIMMs can be upgraded by installing two 32 MB SIMMs. SIMMs in pairs of equal-sized memory.

DPE plus 64 MB of instruction and data memory and 16 MB of shared (packet) memory

Obtain a cable to connect the device to the CONSOLE port on the front panel of the main processor module.
AUXILIARY connector DB9 Reserved for internal 3Com use and is not operational.
DIAGNOSTIC connector DB9 Reserved for internal 3Com use and is not operational.

Console pinouts  on the CEC20 module front panel.

 CONSOLE Connector Pin Assignments
Pin No. Function
1 Carrier detect
2 Receive data
3 Transmit data
4 Data terminal ready
5 Signal ground
6 Data set ready
7 Request to send
8 Clear to send
9 Ring indicator

9-pin to 9-pin PC Cable (Null Modem-Type) pinouts for a 9-pin female to 9-pin female PC cable. A null modem-type cable can be used.


9-pin to 25-pin Terminal Cable (Null Modem-Type) pinouts for a 9-pin female to 25-pin male or female terminal cable. A null modem-type cable can be used.


9-pin to 25-pin Modem Cable (Straight-Through-Type) pinouts for a 9-pin female to 25-pin male modem cable. A straight-through-type cable can be used.


CONSOLE Port Configuration Settings

Characteristic

Setting

Baud rate

9600

Databits

8

Parity

None

Stop bits

1

DTR

Ignored

Duplex

Full

Echo

Off

Flow control

X-on/X-off