AT&T 7500 User Manual page 8

Table of Contents
Stand-Alone Asynchronous DTE Configuration
Stand-Alone Multipurpose Enhancement DCE Configuration
Stand-Alone High Speed Synchronous DCE Configuration
Installing NT1 or Terminating Resistor Adaptor
Installing the 7500 Data Module in a 77A Data Mounting
9: TECHNICAL INFORMATION
7500 — Asynchronous DCE
Attached Data Terminal Equipment Requirements
Data Rates
DCE EIA Interface Information
Pin 2 - Transmitted Data (BA)
Pin 3 - Received Data (BB)
Pin 4 - Request-to-Send (CA)
Pin 5 - Clear-to-Send (CB)
Pin 6 - Data Set Ready (CC)
Pin 7 - Signal Ground (AB)
Pin 8 - Received Line Signal Detect (CF) or Data Carrier Detect
Pin 9 - Positive Polarity Test Voltage
Pin 10 - Negative Polarity Test Voltage
Pin 18 - Local Loopback (LL)
Pin 20 - Data Terminal Ready (CD)
Pin 21 - Remote Loopback (RL)
Pin 22 - Ring Indicator (CE)
Pin 25 - Test Mode (TM)
7500 — Asynchronous DTE
Attached Data Communications Equipment
Data Rates
DTE EIA Interface Information
Pin 2 - Transmitted Data (BA)
Pin 3 - Received Data (BB)
Pin 4 - Request-to-Send (CA)
Pin 5 - Clear-to-Send (CB)
Pin 6 - Data Set Ready (CC)
Pin 7 - Signal Ground (AB)
Pin 8 - Received Line Signal Detect (CF)
Pins 12 and 13 - Speed Mode Indicators (CI and CI2)
Pin 18 - Analog Loopback (CN)
Pin 20 - Data Terminal Ready (CD)
Pin 21 - Remote Loopback (RL)
Pin 22 - Ring Indicator (CE)
Pin 25 - Test Mode
7500 — Synchronous DCE
Data Terminal Equipment Requirements
Data Rates
Synchronous Interface Information
Pin 7/B - Signal Ground
Pin 4/C - Request-to-Send
Pin 5/D - Ready for Sending
Pin 6/E - Data Set Ready
Pin 8/F - Received Line Signal Detect
Pins 3/R and 3/T - Received Data
Pins 17/V and 17/X - Receiver Signal Element Timing
iv
1 1 1
1 1 6
1 1 6
1 1 7
1 1 9
1 2 9
1 2 9
1 2 9
1 2 9
1 2 9
1 2 9
1 3 0
1 3 0
1 3 0
1 3 0
1 3 0
1 3 0
1 3 0
1 3 0
1 3 0
1 3 1
1 3 1
1 3 1
1 3 1
1 3 2
1 3 2
1 3 2
1 3 2
1 3 2
1 3 3
1 3 3
1 3 3
1 3 3
1 3 3
1 3 3
1 3 3
1 3 4
1 3 4
1 3 4
1 3 4
1 3 4
1 3 5
1 3 5
1 3 5
1 3 5
1 3 6
1 3 6
1 3 6
1 3 7
1 3 7
1 3 7
1 3 7