Viking Phone Line Powered Digital Voice Announcer - DVA-LPA

Viking Electronics DVA-LPA Line-Powered Digital Voice Announcer

Overview

The Viking Electronics DVA-LPA is a non-volatile digital voice announcer built for telephone line applications that demand a simple, reliable single-message playback without any external power source. Designed specifically for ring-trip scenarios, the DVA-LPA draws everything it needs directly from the telephone line — 24V DC at 20 mA loop current minimum — which eliminates the need to provision a separate power run to the device. If you're deploying in a location where pulling AC power is impractical or cost-prohibitive, this is worth a close look.

At 4.75" x 2.75" x 1.38", it's compact enough to tuck into a terminal enclosure or junction box. The single RJ11 modular plug connection keeps wiring straightforward: land the line, record your message, done. The unit connects to the Viking Electronics telecom product line and integrates naturally into existing telephone entry system deployments.

Key Features

• Telephone Line Powered (24V DC, 20 mA minimum): The DVA-LPA draws power directly from the phone loop — no transformer, no wall wart, no separate power circuit. On a retrofit where opening walls for conduit isn't in scope, this single attribute can make or break the install.
• 16-Second Non-Volatile Message Storage: Sixteen seconds covers most lobby greeting, directory, or after-hours instruction scripts. Non-volatile storage means a power interruption — even a prolonged one — won't erase the recorded message. Come back online and the unit plays exactly what was recorded.
• 64K Equivalent Sampling Rate: The 64K sampling rate delivers intelligible, clear voice reproduction adequate for telephone-grade audio. Callers will understand the message without distortion on standard PSTN or on-premise PBX lines.
• 80 ms CPC Detection: The 80-millisecond Calling Party Control detection time means the unit responds quickly to loop-current drops, enabling clean call termination handling without introducing noticeable lag in the voice path.
• FCC Part 15 Class A Compliant: Part 15 Class A certification means the DVA-LPA meets emissions standards for commercial and light-industrial environments. You can install it in an office or light-industrial setting without worrying about RF interference complaints.
• Compact Form Factor (4.75" x 2.75" x 1.38"): At roughly the size of a deck of cards, it fits inside most telecom enclosures, IDF closets, or door-entry controller cabinets without dedicated panel space.
• Single RJ11 Connection: One modular plug handles both power and signal. There are no terminal blocks to wire, no separate audio connectors — which reduces installation time and eliminates a common wiring error point on job sites.
• Operating Temperature 0°C to 32°C (32°F to 90°F): Rated for standard indoor commercial temperature ranges. This is an indoor-only device — don't spec it for exterior enclosures or unheated equipment rooms in cold climates.

Integration and Compatibility

The DVA-LPA (often searched as DVA LPA) connects to any standard analog telephone line or PBX analog port via RJ11. It is suited for door entry and intercom systems requiring a single outbound announcement on ring, automated attendant overflow, or simple audio notification applications on analog loops. For installations requiring time-and-temperature announcements or more complex multi-message logic, consider other models in the Viking Electronics announcer family — the DVA-LPA is specifically optimized for single-message, line-powered simplicity. Pair with a telephone line surge protector on exposed or long loop runs to protect the unit from transient events.

Frequently Asked Questions

Q: Does the DVA-LPA require an external power supply?

A: No. The DVA-LPA is powered entirely by the telephone line — it requires 24V DC at a minimum of 20 mA loop current. No external power supply or AC outlet is needed.

Q: How long can the recorded message be?

A: The DVA-LPA supports a single message up to 16 seconds in length. The message is stored in non-volatile memory and survives power interruptions without data loss.

Q: What is the warranty on the DVA-LPA?

A: Viking Electronics provides a 2-year manufacturer warranty on the DVA-LPA.

Q: Is the DVA-LPA suitable for outdoor installation?

A: No. The operating temperature range is 0°C to 32°C (32°F to 90°F) and humidity is rated 5% to 95% non-condensing — this is an indoor commercial device. It should not be installed in unheated spaces, exterior enclosures, or environments subject to condensation.

Q: What type of connection does the DVA-LPA use?

A: A single RJ11 modular plug. Both power and audio signal are carried on the same telephone line connection — there are no separate power or audio terminals to wire.

Q: Is the DVA-LPA FCC certified?

A: Yes. The DVA-LPA carries FCC Part 15 Class A certification, making it compliant for use in commercial environments.

Karl Wilson

The DVA-LPA is one of those devices that earns its place in the toolkit precisely because of what it doesn't need. Drawing power directly from the telephone loop at 24V DC and 20 mA minimum, it removes the power-provisioning problem entirely — a real advantage on retrofit door-entry and ring-trip jobs where the only home-run available is the existing phone pair.

Technical Highlights:

• Line-Powered Operation: 24V DC at 20 mA loop current minimum — no transformer, no outlet, no conduit run for power. The phone line handles everything.
• Non-Volatile 16-Second Storage: Message survives power loss intact. On a site that experiences frequent line drops or power cycling, you won't be dispatched to re-record the announcement.
• 80 ms CPC Detection: Fast enough to handle loop-current-drop call termination cleanly on standard analog PBX ports and PSTN lines without perceptible lag.

Deployment Considerations:

• Confirm your analog loop delivers at least 20 mA — some long cable runs or older PBX ports with high-impedance outputs may fall short, and the unit won't power up reliably below that threshold.
• Operating temperature tops out at 32°C (90°F): an IDF closet with poor ventilation or a sun-exposed enclosure in summer can push past this limit. Verify ambient conditions before specifying it for equipment rooms without climate control.

The DVA-LPA is the right spec for a lobby auto-attendant overflow, a single-message apartment entry phone, or any analog ring-trip application where budget is tight, wiring is minimal, and the message never changes — exactly the scenario Viking designed it for.