 | Article ID: 1583 |
| Q&A | |
DSU 56/64 Interface Pinouts
Q:
DSU 56/64 DSU 56/64 Interface Pinouts
A:
The following charts give the pin assignments for the DSU 56/64 interfaces. They can also be found in the DSU 56/64 User Manual, Chapter 2. Installation.
Network Connections
This interface consists of four leads paired to provide separate transmit and receive circuits. The four leads are provided on the eight position modular jack (RJ-48S) labeled TELCO on the rear panel of the DSU 56/64.
| Pin Number | Function | Signal Direction |
|---|---|---|
| 1 | Transmit Data (R) | From Customer to Network Interface |
| 2 | Transmit Data (T) | From Customer to Network Interface |
| 3-6 | Not Used | |
| 7 | Receive Data (T-1) | From Network Interface to Customer |
| 8 | Receive Data (R-1) | From Network Interface to Customer |
DTE Pin Assignments
The data terminal equipment is attached to the connector labeled PRIMARY V.35 at the rear of the DSU 56/64. The maximum cable length recommended is 100 feet. The primary DTE rate is configured from the front panel and can operate in asynchronous or synchronous modes.
To prevent possible radio frequency interference emissions, a shielded cable is required.
| Pin | EIA | Description |
|---|---|---|
| A | 101 | Protective Ground (PG) |
| B | 102 | Signal Ground (SG) |
| C | 105 | Request to Send (RS) |
| D | 106 | Clear to Send (CS) |
| E | 107 | Data Set Ready (SR) |
| F | 109 | Received Line Signal Detector (CD) |
| R | 104 | Receive Data (RD-A) |
| T | 104 | Receive Data (RD-B) |
| V | 115 | Receiver Signal Element Timing (SCR-A) |
| X | 115 | Receiver Signal Element Timing (SCR-B) |
| P | 103 | Transmitted Data (SD-A) |
| S | 103 | Transmitted Data (SD-B) |
| Y | 114 | Transmitter Signal Element Timing (SCT-A) |
| AA | 114 | Transmitter Signal Element Timing (SCT-B) |
| U | 113 | External TX Signal Element (SCX-A) |
| W | 113 | External TX Signal Element (SCX-B) |
