Viking Electronics E40BN Oil Rubbed Bronze Entry Phone with Automatic Disconnect
Overview
The Viking Electronics E40BN is a compact, telephone line powered, two-way handsfree entry phone engineered for demanding residential and light-commercial door entry applications. Built around an 18-gauge 304 stainless steel faceplate with an oil rubbed bronze finish and a solid 316 stainless steel push button, the E40BN is designed to survive high-traffic, high-abuse entry points without a separate power supply — the phone line carries everything it needs. If you're wiring a front door, gate post, or secure corridor where pulling a power circuit is impractical or expensive, this is the model to evaluate first.
The E40BN fits into a standard single-gang rough-in box (minimum inside dimensions: 2.25" deep × 3.65" wide × 2.84" tall) and also supports surface mounting with an optional VE-3x5 surface mount box — giving installers flexibility whether the box is already in the wall or the installation is a new surface run. Browse the full Viking Electronics intercom and entry phone line for compatible accessories and expansion options.
Key Features
- Telephone Line Powered (18V DC min, 20mA min): The E40BN draws power directly from the telephone line — no 110V outlet, no PoE injector, no transformer. As long as your telephone line delivers at least 18V DC and 20mA, installation costs drop significantly because you're running one pair of wire, not two separate circuits.
- Automatic Disconnect (300ms CPC): The built-in CPC (Calling Party Control) disconnect responds in 300ms minimum, automatically terminating the call when the far end hangs up. This prevents the door phone from staying live and burning phone line time on an abandoned call — a practical requirement in any attended lobby or gate-control application.
- Weather and Vandal Resistance: The faceplate is 18-gauge 304 stainless steel — the same alloy used in commercial kitchen equipment — and the push button is solid 316 stainless steel, a marine-grade alloy with superior corrosion resistance. For entry points exposed to salt air, industrial wash-down environments, or determined vandals, the material spec matters more than the finish.
- Wide Operating Temperature Range (-30°F to 150°F): That's a 180-degree spread — enough to handle northern Minnesota winters and a sun-baked Arizona gate post in the same product. Most residential intercom systems are rated to 32°F at the low end; the E40BN goes 62 degrees colder without needing a heated enclosure.
- 62 dB Speaker at 1m: Loud enough to cut through moderate ambient noise at a busy entry point. In a quiet vestibule this is clear and comfortable; at a loading dock with forklifts nearby you may want to evaluate placement carefully, but for most commercial lobby and residential gate applications 62 dB is adequate.
- Blue LED Indicator: The built-in blue LED gives callers a clear visual confirmation the unit is active and powered — reduces the "did I push the button?" confusion that leads to repeated rings and staff interruption.
- Compact Faceplate (4.875" × 3.125" × 0.18"): The faceplate is thin and small — at 0.18" depth it sits nearly flush with the wall surface. The phone body behind it is 2.84" × 1.8" × 1.65", fitting cleanly in a standard single-gang box. For retrofit installations where the rough-in box is already in place, this geometry eliminates the need for a deep-box swap.
- REN 0.8A Rating: The E40BN counts as 0.8 REN on your telephone line. Most phone lines support up to 5 REN total across connected devices — so you have room to add other phones on the same line without overloading the ring signal, which matters in multi-device entry systems.
- Humidity Tolerance (5%–95% non-condensing): Rated across nearly the full non-condensing humidity range, the E40BN handles covered outdoor locations, garage entries, and high-humidity coastal environments without the condensation-related failures that plague lower-spec intercoms.
Integration and Compatibility
The E40BN connects directly to a standard analog telephone line and works with any telephone or PBX system that can receive and answer a standard ring. The 25V AC RMS minimum ring voltage requirement is well within standard POTS and most analog PBX line card outputs. This entry phone does not require a VoIP gateway, specialized controller, or proprietary hub — any analog phone at the other end answers the door.
For surface mounting, Viking's optional VE-3x5 box accommodates the unit outside a gang box. For enhanced weather protection variants, the E-40-BN-EWP model adds EWP (Enhanced Weather Protection) and is worth evaluating if the installation site is fully exposed rather than covered. Pair with a PoE switch and IP intercom controller if migrating toward a hybrid analog/IP architecture, or integrate directly with a telephone entry system for gate or door access control. For guidance on selecting the right entry phone for your deployment, see our intercom and entry phone selection guide.
Frequently Asked Questions
Q: Does the E40BN require a separate power supply?
A: No. The E40BN is telephone line powered — it draws its operating power directly from the phone line, requiring a minimum of 18V DC and 20mA from the line. No separate power supply or transformer is needed.
Q: What box does the E40BN flush mount into?
A: The E40BN is designed to flush mount into a standard single-gang rough-in box with minimum inside dimensions of 2.25" deep × 3.65" wide × 2.84" tall. For surface mounting, an optional VE-3x5 surface mount box is available separately.
Q: What is the operating temperature range of the E40BN?
A: The E40BN operates from -30°F to 150°F, making it suitable for both harsh winter climates and high-heat outdoor locations such as sun-exposed gate posts or industrial entries.
Q: What is the automatic disconnect feature and why does it matter?
A: The E40BN uses CPC (Calling Party Control) automatic disconnect with a 300ms minimum response time. When the answering party hangs up, the entry phone disconnects automatically within 300ms — preventing the line from staying open and eliminating the need for manual hang-up at the door unit.
Q: Can the E40BN be used with a PBX or multi-line phone system?
A: Yes. The E40BN connects to any standard analog telephone line or analog PBX line card that delivers at least 25V AC RMS ring voltage. It has a REN of 0.8A, well within the 5 REN typical line limit, leaving capacity for additional devices on the same line.
Q: What finish and materials are used on the E40BN?
A: The faceplate is 18-gauge 304 stainless steel with an oil rubbed bronze finish. The push button is solid 316 stainless steel — a marine-grade alloy that provides enhanced corrosion resistance compared to standard stainless steel.
The E40BN stands out to me because of its -30°F to 150°F operating range — that 180-degree spread is genuinely uncommon at this price point and form factor, and it's the first thing I check when a customer is putting an entry phone on a northern-exposure exterior wall or an unshaded gate post in a hot climate. Most installs don't stress the temperature spec, but the ones that do will find most competing units fail first.
Technical Highlights:
- CPC Auto-Disconnect (300ms): Cleans up the call automatically when the far-end hangs up — no stuck-open lines, no manual hang-up procedure at the door unit. Essential for unattended or high-traffic entry points.
- 316 Stainless Push Button: Not a cosmetic detail — 316 stainless resists chloride corrosion that attacks 304, meaning the button holds up in coastal, poolside, and light industrial wash-down environments where the rest of the faceplate would otherwise pit first.
- Telephone Line Powered (18V DC / 20mA min): Single-pair wire run, no power circuit needed. For retrofit installations in existing buildings where adding a power circuit means cutting drywall, this is a real cost and labor savings — often the deciding factor over IP-based alternatives.
Deployment Considerations:
- The single-gang rough-in box must meet minimum inside dimensions of 2.25" deep × 3.65" wide × 2.84" tall — verify box depth before spec'ing the E40BN on a retrofit; undersized old-work boxes are common and will prevent proper mounting.
- Ring voltage requirement is 25V AC RMS minimum — confirm your PBX line card or CO line meets this before installation; some VoIP ATA adapters deliver lower ring voltage and may not reliably trigger the unit.
For a covered residential gate post, multi-tenant building entry, or commercial lobby door where a single analog phone line is already present, the E40BN delivers a clean, low-maintenance install with no network dependency and no power supply to fail. It's the model I'd spec when simplicity and weather tolerance matter more than video or IP integration.
