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The Data Connect DDS64-CDSU is designed for 56 or 64 Kbps synchronous operation over 4-wire point-to-point or multi-point digital leased lines. The DDS64-CDSU can also be used as a line-driver over customer owned wire for links up to 5 miles. The DDS64-CDSU is very simple to set up. For the typical application, the DDS64-CDSU can be attached to the phone line, plugged in, and be in operation in minutes.
| Weight | 0.00 lbs |
|---|---|
| Dimensions | 0.00 × 0.00 × 0.00 in |
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| DIGITAL LINE RATE | 56 or 64 Kbps Bi-Polar Non-Return-to-Zero Modulation 135 ohm +/- 10% Transmit Impedance Transmit Level @ 135 ohm Load, 56 Kbps, 1.4v peak 135 ohm +/- 10% Receive Impedance Receive Level Sensitivity, -49 dB Automatic Equalization |
| DATA RATES | Synchronous Rate of 56 or 64 Kbps |
| OPERATING MODES | Dedicated Digital Service Short Haul Modem Point-to-Point Point-to-Multipoint |
| TRANSMISSION LINE | 4-Wire Leased Line, Telephone Company Digital Line (DDS) 4-Wire in-house 2-Twisted Pair, for Line Driver |
| DEFAULT CONFIGURATION | All Five Dipswitches Down, (Located Behind an Access Panel on the Right Side of the Unit) 56 Kbps Slave Clock (Phone Company Timing) Internal Transmit Clock RTS Normal |
| FRONT PANEL LEDs | Power, Transmit Data, Receive Data, Request to Send, Clear to Send, Carrier Detect, Test |
| LOOPBACKS | Local Bidirectional (Toward Terminal & Toward Phone Line) Telco Initiated CSU or DSU Loopback Test Light (On when Loopbacks are in Use) |
| RESET SWITCH | Push Button Switch (Located Behind an Access Panel on the Right Side of the Unit) |
| CONNECTORS | Telco – RJ-48S, RS232D – DB-25 Female, V.35 – M34 Female |
| PHYSICAL | 10-1/4” W x 9-3/4” D x 2-1/2” H, 1Lb. |
| ELECTRICAL | -48 Volts DC |
| TELCO JACK (RJ-48S) | |
| PIN | SIGNAL |
| 1 | Transmit Data |
| 2 | Transmit Data |
| 7 | Receive Data |
| 8 | Receive Data |
| RS232D/V24 INTERFACE (DB-25S) | |
| PIN | SIGNAL NAME – IN/OUT |
| 1 | Frame Ground |
| 2 | Transmit Data – IN |
| 3 | Receive Data – OUT |
| 4 | Request to Send – IN |
| 5 | Clear to Send – OUT |
| 6 | Data Set Ready – OUT |
| 7 | Signal Ground |
| 8 | Data Carrier Detect – OUT |
| 15 | Transmit Bit Clock – OUT |
| 17 | Receive Bit Clock – OUT |
| 24 | External Transmit Clock – IN |
| V.35 INTERFACE (M34 FEMALE) | |
| PIN | SIGNAL NAME – SIGNAL SOURCE |
| A | Frame Ground |
| B | Signal Ground |
| C | Request to Send – Terminal (Unbalanced) |
| D | Clear to Send – DSU (Unbalanced) |
| E | Data Set Ready – DSU (Unbalanced) |
| F | Data Carrier Detect – DSU (Unbalanced) |
| P | Transmit Data A – Terminal (Balance) |
| S | Transmit Data B – Terminal (Balance) |
| R | Receive Data A – DSU (Balanced) |
| T | Receive Data B – DSU (Balanced) |
| Y | Transmit Clock A – DSU (Balanced) |
| AA | Transmit Clock B – DSU (Balanced) |
| U | Terminal Timing A – DSU (Balanced) |
| W | Terminal Timing B – DSU (Balanced) |
| V | Receive Clock A – DSU (Balanced) |
| X | Receive Clock B – DSU (Balanced) |
| MODEL NUMBER | DESCRIPTION |
| DCE/DDS64-CDSU | 56/64 Kbps DDS Unit with 1-RS232 & 1-V.35 |
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