Lucent Technologies DEFINITY Installation For Adjuncts And Peripherals page 60

DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals 555-233-116
4 Data Modules and Asynchronous Data Units
Connect Data Modules
Pin Name
9 —
10 —
11 —
12 CI
13 CI2
14 —
15 DB*
16 —
17 DD*
18 LL
19 CH2
20 CD (DTR)
21 RL
22 CE (RI)
23 CH
24 DA*
25 TM
* Circuits are not used for asynchronous operation. Outputs are clamped OFF and inputs are ignored.
Configuring the 7400A for data communications
equipment (DCE) applications
If you are not going to use the 7400A data module in a modem pool, proceed as
follows.
Function
Reserved for Testing
Reserved for Testing
Not used
Data Signal Rate Select (DCE Source)
Data Signal Rate Select 2 (DCE Source)
Not used
Transmitter Signal Element Timing (DCE
Source)
Not used
Receiver Signal Element Timing (DCE
Source)
Local Loopback
Data Signal Rate Select 2 (DTE Source)
Data Terminal Equipment Ready
Remove Loopback
Ring Indicator
Data Signal Rate Select (DTE Source)
Transmit Signal Element Timing (DTE
Source)
Test Mode
Issue 1
April 2000
DCE DTE
+12 volts —
-12 volts —
— —
Output Input
— Input
— —
Output Input
— —
Output Input
Input Output
— Output
Input Output
Input Output
Output Input
Input Output
Input Output
Output Input
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