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Technical Specifications A-3
External Serial Port (“Console”)
8-Position Circuit Function Direction
Modular Jack
1
CC Data Set Ready Inbound
2
CF Carrier Detect Inbound
3
CD Data Terminal Ready Outbound
4
AB Signal Ground
5
BB Receive Data Inbound
6
BA Transmit Data Outbound
7
CB Clear to Send Inbound
8
CA Request to Send Outbound
Electrical specification:
Connectors: RS-232, 8-position modular jack
8-position modular jack: Stewart 88-360808 or equivalent
DB-25: Amp 748677-1 or equivalent
Configuration: DTE
Transmission method: Unbalanced RS-232
Transmission rate: 57.6 Kbps maximum
Serial Port Cable (DCE) Specifications
8-Position DB-25M Using Adapter* Function at NIC
Modular Jack (DB-25F)
6
2 3 Transmit Data
5
3 2 Receive Data
8
4 5 Request to Send
7
5 4 Clear to Send
1
6 20 Data Set Ready
4
7 7 Signal Ground
2
8 20 Carrier Detect
3
20 6, 8 Data Terminal Ready
N/C
− N/C Ring Indicate
N/C indicates Not Connected
* DB-25-to-DB-25 null modem adapter
Wire type: Belden 9538 or equivalent, 8
conductor, shielded
Maximum cable distance: 50 feet, 15 meters
Cabling: 8-position modular jack to DB-25
(IBM AT pin-out)