IBM 5155 - Page 362

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13)
14 25
25·Pin Connector
Signal Name - Description Pin
No Connection 1
Transmitted Data
2
Received Data
3
Request to Send
4
Clear to Send
5
Data Set Ready
6
Signal Ground 7
Received Line Signal Detector
8
No Connection
9
No Connection
10
Synchronous
*Select Standby 11
Data Link
External
Control
No Connection 12
Device
Communications
No Connection 14
Adapter
Transmitter Signal Element Timing 15
No Connection 16
Receiver Signal Element Timing 17
*Test (IBM Modems Only) 18
No Connection
19
Data Terminal Ready 20
No Connection 21
Ring Indicator
22
Data Signal Rate Selector
23
No Connection
24
*Test Indicate (IBM Modems Only) 25
*Not standardlzed by EIA (Electromcs Industry Assoc.).
No Connection 13
4 SDLC
January
1984