Viking Surface Mount Chassis - 259275

Viking Electronics 259275 Surface Mount IP Entry Phone System

The Viking Electronics 259275 is a surface-mount IP video entry phone chassis built for commercial access control deployments where you need SIP-based two-way audio, an integrated camera, keypad entry, and Wiegand card reading — all powered over a single CAT5E run from your existing PoE switch. If you're wiring a new building entrance, parking garage gate station, or secured lobby, this is a self-contained unit that handles audio intercommunication, video verification, credential management, and door release without a separate controller box. Browse the full Viking Electronics intercom and entry phone line to see how the 259275 fits into wider campus and multi-door deployments.

Key Features

• PoE Class 2 Power (<6.5W): Draws under 6.5 watts via IEEE 802.3af — standard Class 2, so it won't stress your switch power budget or require a dedicated injector. A single CAT5E cable delivers both data and power up to 1,000 feet, which covers most building perimeter runs without a mid-span booster.
• SIP 2.0 (RFC 3261) over 100BASE-Tx: Native SIP means the 259275 registers directly to your existing PBX or UCaaS platform — no proprietary controller required. Security staff can answer a door call from any SIP desk phone, softphone, or mobile app, keeping your intercom infrastructure unified with your voice system. Check our VoIP entry phone category for compatible SIP infrastructure options.
• 640×480 @ 30fps Camera (420 Lines): The onboard camera delivers standard-definition video at a smooth 30 frames per second with an 80° horizontal / 60° vertical / 100° diagonal field of view. That wide diagonal covers a standard door frame and immediate approach zone — enough for face verification without fisheye distortion. Tilt adjusts ±20° vertically and ±30° horizontally to compensate for off-axis mount positions.
• G.711u / G.711a / G.722 Audio Codecs: G.722 wideband audio (7 kHz) produces noticeably clearer voice than the narrowband G.711 alternatives — useful in high-ambient-noise environments like loading docks or mechanical rooms where intelligibility matters. All three codecs are supported so the unit negotiates automatically with your PBX without manual codec restriction.
• 1,000 Keyless Entry Codes + 1,000 Proximity Card Numbers: The onboard credential store handles up to 1,000 PIN codes and 1,000 Wiegand proximity cards independently — large enough for mid-size office buildings or multi-tenant properties without an external access control server. The 12-button keypad handles both entry codes and call initiation from the same panel face.
• 26-Bit Wiegand Input: Standard 26-bit Wiegand is the most widely deployed access card protocol in North America, so the 259275 is compatible with virtually any existing card reader infrastructure. If you're replacing legacy intercom hardware, your existing card stock almost certainly works without re-issuing credentials. See our access control category for compatible Wiegand readers and panels.
• 2 Sets SPDT Relay Contacts (2A): Two independent SPDT dry-contact relays let you control a door strike and a secondary device — gate, turnstile, or alarm shunt — from a single unit. At 2A switching capacity, these relays handle standard 12V and 24V electric strikes directly without an intermediate relay module.
• -40°F to 140°F Operating Range: Rated for the full extreme-climate envelope — Arctic winters and desert summers alike. The 259275 installs in unheated vestibules, outdoor kiosks, and sun-exposed south-facing walls without thermal de-rating. Humidity tolerance extends to 100% (EWP standard) for coastal and high-moisture environments.
• Gel-Filled Butt Connectors + RJ45: The inclusion of gel-filled butt connectors as a specified connection method signals the 259275 is engineered for outdoor or wet-location splices — gel-fill inhibits corrosion at the wire joint, extending connection life in direct-burial or conduit-wet conditions where standard wire nuts fail within a season.
• CE / FCC Part 15 / ICES-003 Class A: Full regulatory clearance for US and Canadian commercial deployments out of the box. Class A ICES-003 is the commercial/industrial emissions designation — appropriate for data center lobbies, server rooms, and environments sensitive to RF interference.

Integration and Compatibility

The 259275 integrates with any SIP 2.0-compliant PBX, IP-PBX, or cloud phone system — Cisco, Avaya, FreePBX, 3CX, Microsoft Teams (via SIP gateway), and hosted UCaaS platforms. The 26-bit Wiegand output connects directly to the access control panel input of your choice, making it compatible with the majority of commercial panels from HID, Lenel, Software House, and others. For new installations, review our PoE switch selection guide to ensure your switch port delivers sufficient Class 2 budget at the required cable run distance — at 1,000 ft on CAT5E, voltage drop becomes a sizing factor on lower-budget switches.

The integrated camera outputs composite video at 420 lines (640×480). This is not an IP camera stream — video feeds locally, not to your NVR or VMS. If centralised video recording of the entrance is a requirement, pair the 259275 with a dedicated IP security camera covering the same zone. The 259275 handles audio intercommunication and access control; the separate camera handles archival recording.

Frequently Asked Questions

Q: Does the Viking 259275 require a separate power supply, or is PoE sufficient?

A: PoE is sufficient. The 259275 draws under 6.5W (IEEE 802.3af Class 2), so any 802.3af-capable switch port powers it over the CAT5E run — no local power adapter needed.

Q: What is the maximum cable run distance for the 259275?

A: The specified maximum wire run is 1,000 feet over CAT5E. Beyond that distance, PoE voltage drop may affect reliability and you should evaluate a mid-span injector closer to the unit.

Q: How many access credentials does the 259275 store onboard?

A: The 259275 stores up to 1,000 keyless entry PIN codes and up to 1,000 proximity card numbers locally — no external access control server required for basic credential management.

Q: Does the 259275 work with standard SIP phone systems and PBXs?

A: Yes. The 259275 is SIP 2.0 (RFC 3261) compliant, which means it registers with any standards-based SIP PBX or IP phone system. Staff can answer door calls from SIP desk phones or softphones without proprietary middleware.

Q: What Wiegand format does the 259275 support for card readers?

A: The 259275 accepts 26-bit Wiegand input — the North American standard supported by the vast majority of commercial proximity and smart-card credentials in use today.

Q: Is the 259275 rated for outdoor installation in extreme temperatures?

A: Yes. The operating temperature range is -40°F to 140°F with humidity tolerance up to 100% (EWP). It is designed for outdoor and harsh-environment installations without additional enclosure protection.

James Everett

The Viking 259275 is one of the few surface-mount IP entry phone units I'd recommend for unheated exterior vestibules without hesitation — the -40°F floor on the operating range is the real differentiator here. That spec comes up constantly on cold-climate installs where less-rugged intercoms fail by February. The dual SPDT relay outputs are also worth calling out: most competing units at this form factor give you one relay and require an external module for the second door or gate — the 259275 handles both natively at 2A switching.

Technical Highlights:

• 1,000-Credential Onboard Store: Both PIN codes and Wiegand card numbers max out at 1,000 entries each — enough for mid-size commercial buildings without deploying a separate access control server or ACS license.
• PoE Class 2 at 1,000 ft CAT5E: Under 6.5W draw means you're not burning a Class 4 port on a door station. At 1,000 ft runs, verify your switch's power-at-distance spec — not all 802.3af switches actually deliver full Class 2 budget at that cable length.
• G.722 Wideband Audio: 7 kHz bandwidth versus 3.4 kHz for G.711 — the difference is audible in noisy outdoor environments. If your PBX supports G.722, enable it; if it doesn't, the unit falls back to G.711 automatically via SIP codec negotiation.

Deployment Considerations:

• The integrated camera is a composite video output at 420 lines — it is NOT an RTSP/IP stream. If you need entrance footage archived to a VMS or NVR, deploy a separate IP camera on the same zone. The 259275's camera is for live visual verification at the answering station, not recording.
• The rough-in box (4.5" × 9.12" × 2.5") and overall chassis (5" × 10" × 2.5") dimensions should be confirmed against your wall cavity depth before ordering — 2.5" depth is a tight fit in metal-stud walls with insulation, and surface-mount conduit knockouts may conflict with finished wall treatments.

This unit is the right call for multi-tenant commercial buildings, university residence hall entrances, and secured parking structures where you need a single-cable solution handling intercommunication, video verification, PIN entry, and card access in one surface-mounted package — particularly in climates where thermal cycling would disqualify lighter-duty intercom hardware.