{"product_id":"voip-ceiling-speaker-with-talkback","title":"VoIP Ceiling Speaker with Talkback","description":"\u003cp\u003e- PoE powered (class 3, \u0026lt;13 Watts)\u003cbr\u003e- Use with an optional BTR-3 wireless remote to activate calls or adjust speaker volume\u003cbr\u003e- Paging prioritization\u003cbr\u003e- Plays audio from multicast\u003cbr\u003e- SIP endpoint or multicast group member\u003cbr\u003e- Supports up to 10 multicast paging groups\u003cbr\u003e- Add an optional SL-2 blue, green, red or amber strobe light (see DOD 242)\u003cbr\u003e- Blue call status LED indicator\u003cbr\u003e- SIP compliant (see product manual for list of compatible IP-PBX phone systems)\u003cbr\u003e- Automatic Noise Canceling (ANC) feature for operation in noisy environments\u003cbr\u003e- Viking*s proprietary VOX switching eliminates the need for *Push to Talk* mode\u003cbr\u003e- Selectable auto-answer feature for monitoring\u003cbr\u003e- Autoprovisioning via Viking programming software\u003cbr\u003e- Built-in high efficiency 6 watt class D amplifier\u003cbr\u003e- Relay for activating door locks, strobe lights, external amplifiers, etc.\u003cbr\u003e- SIP \/ Multicast: SIP page, SIP page and zoned multicast stream, zoned multicast receive\u003cbr\u003e- Support for access code to prevent unwanted SIP calls\u003cbr\u003e- Line-level audio output for connecting to an external amplifier\u003cbr\u003e- Hangs up on: busy signal, time-out, or touch tone command\u003cbr\u003e- Network remote speaker volume control\u003cbr\u003e- Can drive additional external analog speakers for greater coverage\u003cbr\u003e- Mounting: Blind mounts into 9.5? hole, clearance requirement of 3.45? (87.3mm) above 0.5? gypsum board ceiling\u003cbr\u003e- Heavy duty back box protects speaker and circuitry against plenum dust\u003cbr\u003e- Automatic Gain Control (AGC) to automatically increase ring volume to compensate for ambient noise\u003cbr\u003e- Diagnostics (for testing mic, speaker \u0026amp; relay)\n\u003cbr\u003eUPC: VK-40TB-IP\n\u003cbr\u003eManufacturer: Viking Electronics\n\u003cbr\u003ePartNumber: VK-40TB-IP\u003c\/p\u003e","brand":"Viking Electronics","offers":[{"title":"Default Title","offer_id":42564943675488,"sku":"VK-40TB-IP","price":551.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/2462\/2944\/files\/22a72c70-63fd-4a45-896b-3a248fc9727c.jpg?v=1770471986","url":"https:\/\/supplycentralstore.com\/products\/voip-ceiling-speaker-with-talkback","provider":"supplycentralstore2025","version":"1.0","type":"link"}