Viking Electronics K-1900-9 AC Single or Multi-Number Dialer
Overview
The Viking Electronics K-1900-9 is a compact, AC-powered telephone dialer designed for facilities that need programmable automatic dialing on standard loop-start CO lines or analog PABX/KSU systems. At 2.8" x 1.4" x 4.7" and shipping at 1 lb, the K-1900-9 installs where space is tight — junction boxes, control panels, or wall-mount enclosures. It runs directly on 120V AC, converting to 13.8V DC at 1.25A internally, so no separate power brick or battery backup is required. Non-volatile memory means stored numbers survive power outages without a backup battery. If you are searching for this unit, it is also commonly referenced as K 1900 9.
Key Features
- 100 stored phone numbers, up to 32 digits each: A single unit covers an entire building's emergency or notification contact list — enough for multi-tenant facilities or large campus deployments without chaining multiple dialers.
- Non-volatile memory (no batteries required): Programming survives a power cut without any battery maintenance cycle. For unattended installations — elevator pits, utility closets, remote gate stations — that eliminates a recurring service call.
- Configurable as hot-line or multi-number dialer: Deploy it as a dedicated single-number hot-line (press = dial one number, every time) or as a multi-number selector. One SKU covers both use cases, reducing your stocking requirement.
- Dual dialing speed — 120ms normal, 60ms high: High-speed mode (60ms on/off) cuts call-setup time roughly in half compared to standard mode. On systems with many sequential dial attempts, that adds up to faster alarm response.
- Contact closure initialization (100ms minimum): The dialer triggers on a dry-contact input — compatible with virtually any alarm panel relay, door controller, or sensor output that provides a momentary closure.
- Works on any standard loop-start CO or analog PABX/KSU line: No special line type required. If you have a plain analog port on your PBX or a POTS line from the carrier, the K-1900-9 will run on it.
- 120V AC powered, 13.8V DC output: Draws from a standard wall circuit. No low-voltage transformer sourcing, no UPS coordination for the dialer itself — just a standard outlet or panel circuit.
- Operating range 32°F to 90°F, 5–95% RH non-condensing: Suitable for conditioned indoor spaces. Not rated for outdoor or unconditioned mechanical rooms in climates with temperature swings below freezing.
Integration and Compatibility
The K-1900-9 integrates with any system that provides a dry-contact relay output — access control panels, fire alarm auxiliaries, HVAC controllers, or perimeter sensors. It operates on loop-start analog lines, making it compatible with legacy PBX analog ports, ATA adapters feeding VoIP infrastructure, or direct POTS. Programming is handled locally via the unit's keypad; no software, PC, or network connection is required. For facilities already running Viking Electronics intercoms or emergency phones, the K-1900-9 fits naturally into the same wiring infrastructure. If you are evaluating auto dialers for alarm notification or access control, review your line type first — analog loop-start is required, SIP-only IP lines are not directly compatible without an ATA.
Frequently Asked Questions
Q: Does the K-1900-9 require a dedicated phone line, or can it share a line?
A: The K-1900-9 operates on any standard loop-start CO line or analog PABX/KSU port. Whether it shares or gets a dedicated line depends on your system design, but the unit itself does not require a dedicated leased or special line.
Q: Will stored numbers be lost if power goes out?
A: No. The K-1900-9 uses non-volatile memory, so all 100 stored phone numbers are retained through a power outage without any battery backup required.
Q: How many phone numbers can the K-1900-9 store, and how long can each number be?
A: It stores up to 100 telephone numbers, each up to 32 digits long — sufficient for extension codes, access codes, or international numbers with country and area codes.
Q: What triggers the K-1900-9 to dial?
A: A dry-contact closure input of at least 100ms triggers the dialer. This is compatible with standard alarm panel relay outputs, door controller auxiliaries, or most sensor dry-contact outputs.
Q: What is the warranty on the K-1900-9?
A: The K-1900-9 carries a 2-year limited manufacturer warranty.
Q: Is the K-1900-9 suitable for outdoor installation?
A: No. The operating temperature range is 32°F to 90°F in 5–95% non-condensing humidity. It is designed for conditioned indoor environments only.
The K-1900-9 is one of those units that solves a specific problem cleanly: you need automatic dialing triggered by a dry contact, you have an analog line available, and you want non-volatile storage so a power event does not wipe your programming. At 100 numbers with up to 32 digits each, it covers complex dial strings — carrier access codes, PBX routing digits, international prefixes — without truncation.
Technical Highlights:
- Dual dialing speed: The 60ms high-speed mode is roughly half the pulse width of the 120ms normal mode — meaningful when the dialer is making sequential attempts through a multi-number list and call setup latency matters.
- Contact closure trigger (100ms minimum): The 100ms minimum is short enough to catch a standard alarm panel relay pulse. Any panel output that holds the relay closed for at least 100ms will reliably trigger a dial sequence.
- 120V AC / 13.8V DC, 1.25A internal supply: Self-contained power conversion means no external transformer and no low-voltage power supply to source separately — just a standard 120V circuit, which is almost always available wherever this unit gets installed.
Deployment Considerations:
- Verify your PBX or CO line is loop-start analog before specifying this unit. SIP trunks and digital extensions require an ATA between the line and the K-1900-9.
- Operating temperature tops out at 90°F — unconditioned utility rooms or equipment closets in summer climates can exceed that. Confirm ambient before installing.
This unit is the right call for indoor access control or alarm notification applications where a facility already has an analog line or ATA-terminated VoIP port and needs reliable, battery-free auto-dialing with a large number directory — multi-tenant residential buildings, commercial access control panels, and elevator emergency phone systems are the practical sweet spots.
