DVSD-3000 · SD card / USB load message-on-hold system

Overview

The DVSD-3000 is a highly reliable audio playback system designed specifically for Message-On-Hold. It plays music and marketing messages while callers wait on hold or customers shop in your retail location, which heightens awareness, minimizes frustration and increases sales.

It holds up to 20 individual audio messages in WAV or MP3 files, played from a removable SD card or straight from a USB memory key; files on these media are not lost in a power outage. Two audio outputs (600 Ω line and 8 Ω speaker) with level control and tone adjustment let the sound be optimized for almost any telephone or public address system.

• In the box: DVSD-3000 with a 2 GB SD card installed, power pack, audio cable, mounting hardware and user’s manual.
• Optional USB memory keys: MUSB-256 (256 MB) and MUSB-1GB (1 GB).

Installation

Before installing, make sure you have a message-on-hold or music-on-hold input on the telephone system (or a line level input on the public address system) and a non-switched 120 VAC outlet near the unit.

• Mounting: the unit mounts on the telephone equipment board or a wall in one of three positions: flat, side or horizontal. Mark the mounting holes and fasten it with the screws provided; for table-top use, stick the enclosed rubber feet on the bottom.
• Power: plug the power pack into an outlet that is not controlled by a switch, then into the jack marked 12VDC. There is no power switch; the system is active as soon as power is connected.
• Telephone system: connect the supplied RCA to RCA cable from LINE OUT to the telephone system’s line level (M-O-H) input. Start with LINE OUT and set the level with the output level knob; if it cannot reach a high enough level, use SPKR OUT instead.

Connections

• 12VDC (2.5 mm barrel): powered by the supplied 12 VDC, 1 A adapter; use only the adapter supplied by the manufacturer.
• LINE OUT (RCA, mono): 600 Ω line output, up to +4 dB, the standard level for most applications. Connect it to the telephone or PA system first.
• SPKR OUT (RCA, mono): amplified output, 2.5 W into 8 Ω, for an on-hold circuit or PA amplifier that the line output cannot drive to a high enough level.
• USB memory key connector: plays audio files directly from a USB key, or copies them to the SD card if one is installed.
• SD card connector (top side): plays audio files directly from the SD card.

Loading messages

The unit arrives without messages on its SD card. To load messages, insert a pre-recorded, properly prepared USB memory key with its label facing the top of the unit; playback starts automatically.

If an SD card is installed when a USB key with valid audio is inserted, the DVSD-3000 stops playing, erases the SD card and copies the audio files from the key to the card, then plays from the card. The red COPYING LED is lit during the transfer: do not remove either memory or remove power, or the memory could be corrupted. There is no undo. If the key holds no audio files, the SD card is not erased and nothing is copied.

• SD card with valid audio installed: the system plays from the SD card.
• No SD card, valid USB key inserted: the system plays from the USB key.
• Both present: the transfer runs first, then playback starts from the SD card.

Preparing the audio files

• Formats: WAV (44.1 kHz, 16 bit) or MP3 (44.1 kHz, 32 to 320 kbps, VBR); other formats will not play properly.
• Put all audio files in the root folder of the memory.
• Files may be mono or stereo, but only the left channel is played.
• Use one long message or several shorter ones; messages need not be the same length.
• Set the audio to a nominal level of −4 dBm; keep the dynamic range of the production low so it can be recorded at the highest level without exceeding 0 dBm.
• Files play in alphanumeric order, so name them to show their content and order, for example 1_brownies.mp3, 2_apples.mp3, 3_top sirloin.mp3.
• Only the first 20 messages in that order are played.
• If two files have the same name with different extensions, the MP3 file plays before the WAV file.

Playback, controls and indicators

After power-up the DVSD-3000 plays the files in memory automatically, with no control or user input; it plays message 1 through the last message, then loops back to message 1.

• Output level knob: sets the level of both audio outputs; clockwise raises it.
• Tone adjust knob: clockwise lowers the bass and adds treble, counter-clockwise lowers the treble and adds bass; at the center no bass or treble is added.
• Speaker pushbutton: turns the internal monitor speaker on or off, to preview playback. The speaker ships off, and its volume is fixed at the factory.
• MEMORY OK LED (green): solid when an SD card or USB key with at least one valid audio message is detected; blinks quickly twice every half second when the memory has no valid audio; blinks twice per second while no memory is detected.
• COPYING LED (red): lit while files are copied from the USB key to the SD card; blinks twice per second after a transfer error until power is cycled or the key is removed and reinserted to restart the transfer.
• PLAYING LED (green): solid while messages are playing.

Power failure and troubleshooting

The SD card and USB key need neither power nor battery backup to keep their contents, so brownouts and power losses do no harm; when power returns, the system resumes what it was doing.

• No LEDs lit → check that the power adapter is in a non-switched outlet and fully plugged into the unit.
• Memory will not insert → align it properly and check the slot for foreign objects.
• Nothing plays after a memory is inserted, the transfer to the SD card fails, or the USB key will not play → check that the memory is seated and that its root folder holds at least one MP3 or WAV file; try copying the files to another key.
• No sound from the output → check the RCA cable at both ends, turn the output level clockwise, or use the 8 Ω output instead of the line output.
• No sound from the monitor speaker → if the Playing LED is off, there are no messages; press the Speaker button to toggle the speaker; check that the audio was not recorded too low.