Instruction manual

ATLAS 800 Series System Manual Option Module Pinouts

Engineering Guidelines

Pinout 19. Quad USSI Module (RS-232)

Pin Signal Description Pin Signal Description

1 Shield (Ground) 14 Sec. Transmit Data

2 Transmit Data 15 DCE Transmit Clock

3 Received Data 16 Sec. Received Data

4 Request to Send 17 Receive Signal Element Timing

5 Clear to Send 18 Not used

6 Data Set Ready 19 Sec. Request to Send

7 Signal Ground 20 Data Terminal Ready

8 Received Line Signal Detector 21 Signal Quality Detector

9 + Voltage 22 Ring Indicator

10 - Voltage 23 Data Signal Rate Selector

11 Not used 24 DTE Transmit Clock

12 Sec. Received Line Signal Indicator 25 Not used

13 Sec. Clear to Send

Pinout 20. Quad USSI Module (CCITT X.21 V.11)

Pin Signal Description Pin Signal Description

1 Shield (Ground) 8 Signal Ground

2 Transmit Data (A) 9 Transmit Data (B)

3 Request to Send (A) 10 Request to Send (B)

4 Received Data (A) 11 Received Data (B)

5 Carrier Detect (A) 12 Carrier Detect (B)

6 Transmit/Receive Clock (A) 13 Transmit/Received Clock (B)

7 Ext. Transmit Clock (A) 14 Ext. Transmit Clock (B)

15 Not Used