Section 2, Engineering Guidelines ATLAS 550 System Manual
40 © 2002 ADTRAN, Inc. 61200305L1-1F
12 DTE Ready (A) 30 DTE Ready (B)
13 Carrier Detect (A) 31 Carrier Detect (B)
14 Remote Loopback * 32 Select Standby *
15 Ring Indicator 33 Signal Quality *
16 Select Frequency * 34 New Signal *
17 Ext. Transmit Clock (A) 35 Ext. Transmit Clock (B)
18 Test Mode * 36 Standby/Indicator *
37 Send Common *
Connector type RS-232
System part number 4200754L4
Table 21. RS-232 Connector Pinout
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
* Ignored by Dual USSI Module
Table 20. RS-449/V.36 Connector Pinout (Continued)
PIN SIGNAL DESCRIPTION PIN SIGNAL DESCRIPTION
* Ignored by Dual USSI Module
