The DCB DV-1 is a 56 Kbps DSU/CSU which provides one data and one voice channel over a 56 Kbps digital line. The data channel can operate at 9600, 19,200 or 38,400 bps and includes both a V.35 and an RS-232 interface connector. The voice channel will operate at 16 or 32 Kbps. Three voice interfaces are provided: a modular RJ-11 interface for a standard 2 wire telephone set; a modular RJ-11 interface for connection to a PBX station line; a modular RJ-45 interface for 4 wire E&M PBX tie line connections.
Data Port
Composite Port
Voice Ports
Environmental
Unpacking
The following is included with each DV-1
Location
Place the DV-1 in a clear area where you can reach the rear panel for setup and to connect the cables. The DV-1 has an external power supply that requires a properly grounded 120 VAC outlet.
Setup
Setup of the DV-1 is done using the rear panel DIP switches.
Connections
Connect the DV-1 to the phone line using the RJ-45 to RJ-45 cable provided. Connect the terminal device (multiplexer, LAN, host computer, controller) to the RS-232 or V.35 port of the DV-1. Connect the telephone, key system, PBX or phone line to the appropriate RJ voice port of the DV-1.
A 10-position DIP switch is located on the right hand side of the rear of the unit. This DIP switch is used to set the unit configuration. The switch positions are numbered 1 through 10 and their functions are as follows:
| S1-1 | S1-2 | Voice Mode | |
| UP | UP | Do not use this setting | |
| UP | DN | Tie Trunk | 4 wire E&M |
| DN | UP | Telephone Set | Telset |
| DN | DN | PBX | PBX Line |
| S1-3 | S1-4 | Voice Rate | Data Rate |
| UP | UP | 16 Kbps | 19.2 Kbps |
| UP | DN | 16 Kbps | 38.4 Kbps |
| DN | UP | 32 Kbps | 9.6 Kbps |
| DN | DN | 32 Kbps | 19.2 Kbps |
| S1-5 | Sync/Async | |
| UP | Synchronous | default |
| DN | Asynchronous |
| S1-6 | Slave/Master Clock | |
| UP | Slave Clock | default |
| DN | Master Clock | use for line driver mode only |
| S1-7 | RTS Mode | |
| UP | RTS Controlled by DTE | default |
| DN | RTS Forced on |
| S1-8 | CTS Mode | |
| UP | CTS Normal | default |
| DN | CTS Forced on |
| S1-9 | Async data length | |
| UP | 9 Data bits | |
| DN | 8 Data bits | typical for async operation |
| S1-10 | Enable/Disable Test Modes | |
| UP | Test Modes Enabled | default |
| DN | Test Modes Disabled | to prevent accidental test activation |
The Select switch is located on the front of the unit and is used to select test modes. Pressing once selects Self Test. A second press selects Digital Loopback, etc. You must cycle through all four test modes to return to normal operation. Therefore, the switch must be pressed a total of five times to return the unit to normal operation.
The indicators on the front of the unit are divided into two groups; six status indicators on the left, four test indicators on the right.
| INS |
|
| DCD |
|
| RTS |
|
| CTS |
|
| TxD | Flashes when transmit data is present. |
| RxD | Flashes when receive data is present. |
| Self Test |
|
| Digital Loop |
|
| Line Loop |
|
| Remote Test |
|
| Pin | Signal |
| 1 | Transmit Data |
| 2 | Transmit Data |
| 7 | Receive Data |
| 8 | Receive Data |
| Pin | Signal | In/Out |
| 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 Clock | OUT |
| 17 | Receive Clock | OUT |
| 20 | Data Terminal Ready | IN |
| Pin | Signal | Signal Source |
| B | Signal Ground | |
| C | Request to Send Terminal | (unbalanced) |
| D | Clear to Send DV-1 | (unbalanced) |
| E | Data Set Ready DV-1 | (unbalanced) |
| F | Data Carrier Detect DV-1 | (unbalanced) |
| P | Transmit Data A Terminal | (balanced) |
| S | Transmit Data B Terminal | (balanced) |
| R | Receive Data A DV-1 | (balanced) |
| T | Receive Data B DV-1 | (balanced) |
| Y | Transmit Clock A DV-1 | (balanced) |
| AA | Transmit Clock B DV-1 | (balanced) |
| V | Receive Clock A DV-1 | (balanced) |
| X | Receive Clock B DV-1 | (balanced) |
| Pin | Signal |
| 3 | Ring |
| 4 | Tip |
| Pin | Signal | ||
| 1 | Signal Ground | ||
| 2 | Ear | Control signal to PBX | The printed manual is incorrect on this! |
| 3 | Tip | Receive from PBX | |
| 4 | Tip | Transmit to PBX | |
| 5 | Ring | Transmit to PBX | |
| 6 | Ring | Receive from PBX | |
| 7 | Mouth | Control signal from PBX | The printed manual is incorrect on this! |
| 8 | Station Battery |
| Pin | Signal |
| 3 | Ring |
| 4 | Tip |
Testing Self Test
Push the select button once. The Self Test LED will flash red and internally the transmitter is connected to the receiver. An internal test pattern generator runs a complete diagnostic on the unit. In about 5 seconds, the Self Test LED should change from flashing RED to flashing GREEN. Return to the normal mode by pushing the front panel button until the test LED is out. Digital Loop
Push the test button until the Digital Loop LED flashes. Internally, the unit is configured as below. This test allows the user to run a complete "round trip" test as shown below. Line Loop
Push the select button until the Line Loop LED flashes. The unit is internally looped. The user can now use a test set plugged into the TERMINAL connector to run tests. Functionally, this is the same as the Self Test except that the internal pattern generator is not used. Remote Test
Push the select button until the Remote Test light flashes. It will flash red until it detects an "OK" pattern from the remote unit. The Remote Test light will then flash green. The remote unit is in a remote test condition and a complete "round trip" test is being performed by the internal pattern generator. To end this test, push the select button one more time. Voice Testing
First verify that the DSU function of the DV-1 is operating, per the steps outlined above. If you are still unsure about the voice path, the easiest and most inexpensive troubleshooting begins with using a single line telephone at each end.
Set the DV-1 switch 1 down and 2 up for connection to a telephone. Plug a single line phone into the "Telset" connection at both ends. Pick up a phone at one end and it should ring at the other. When the phone is answered, an end to end voice path should now be established.
All DCB products are warranted to be free of defects in materials and workmanship for one year. DCB of Champaign, Inc. will repair or replace any equipment proven to be defective within the warranty period. All warranty work is F.O.B. Champaign, IL. This warranty is exclusive of abuse, misuse, accidental damage, acts of God or consequential damages, etc. DCB liability shall not exceed the original purchase price.
All equipment returned for warranty repair must be accompanied by a Returned Material Authorization (RMA) number. To receive an RMA number, call 217-352-3207 between the hours of 8 AM and 5 PM central time. Equipment must be shipped prepaid to DCB and will be returned at DCB's expense.