AT&T DEFINITY 2500 series Network Manual page 295

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PIN EIA
NO. INTERCHANGE
CIRCUIT
1
2 BA
3 BB
4 CA
5 CB
6 CC
7 AB
8
9
10
11
12 SCF
13 SCB
14 SBA
15 DB
16 SBB
17 DD
18
19 SCA
20 CD
21 RL/CG
22
23 CH/CI
24 DA
25 TM
Table E-2. EIA RS-232D (V.28) LEADS/DEFINITIONS
CCITT
EQUIVALENT
CIRCUIT
— —
103
104
105
106
107
102
CF 109
— —
— —
— —
122
121
118
114
119
115
LL —
120
108/2
140/110
CE 125
111/112
113
LEAD DESCRIPTION
(FUNCTION)
Shield
Transmitted Data
Received Data
Request to Send
Clear to Send
DCE Ready
Signal Ground/Common Ground
Received Line Signal Detected
Reserved for Testing,
(+P) Transmit Current Loop Data
Reserved for Testing
Unassigned
Secondary Received Line Signal
Detect—(Speed Mode Indication)
Secondary Clear to Send
Secondary Transmitted Data
Transmitter Signal Element Timing
(DCE Source)
Secondary Received Data
Receiver Signal Element Timing
(DCE Source)
Local Loopback
Secondary Request to Send
DTE Ready
Remote Loopback/Signal Quality Detector
Ring Indicator
Data Signal Rate Selector
(DTE/DCE Source)
Transmitter Signal Element Timing
Test Mode
E-3
LEAD DEFINITIONS