Versions:
- Algo 8305 (SIP)
- Algo 8305-IC (Informacast)
Tired of choosing between keeping your old paging system or starting over? The Algo 8305 Multi-Interface IP Paging Adapter lets you do both. It plugs right into your existing talk battery, speaker, or amplifier setup while speaking fluent SIP and multicast on your VoIP network. You get clear, reliable pages, tones, and scheduled announcements today – plus an easy path to full IP paging later.
The Telecom Spot Expert Take: If your building still runs on analog paging amps but your phones are now cloud-based, the 8305 is the cleanest bridge you’ll find. It’s built specifically for that hybrid moment most IT teams face during upgrades: keep the speakers that already work, lose the old PBX headaches. We see it shine in schools, warehouses, and mid-size offices where ripping out ceiling speakers just isn’t in the budget. The combination of telephone-port emulation, direct 8Ω drive, and multicast scaling makes it more flexible than single-purpose adapters. Bottom line: you modernize communications without tearing down walls or breaking the bank.
Key Features
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Telephone port that acts like a real analog phone – Connects directly to legacy paging amp talk battery pairs so your new SIP system can trigger pages exactly like the old desk phone did. No extra converters needed.
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Direct 8Ω output for self-amplified speakers – Plug in up to a handful of powered speakers and you’re done – perfect for small zones or break rooms.
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Balanced line output – Feeds any standard paging amplifier cleanly; polarity doesn’t even matter.
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Built-in scheduler & audio storage – Upload WAV or MP3 files and set recurring bells, shift-change announcements, or emergency messages – runs automatically via NTP.
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Multicast send & receive – Share pages across both old analog and new IP speakers in the same zone list (up to 50 zones).
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Relay input & output – Wire in a call button or volume control for instant emergency alerts or local control.
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Wideband G.722 audio – Pages sound natural and intelligible instead of tinny and hard to understand.
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PoE powered – One Ethernet cable does power and data; no extra outlets required.
Technical Specifications
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Power: PoE (IEEE 802.3af Class 0), max 4 W, idle 2 W
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Audio Codecs: G.711 u-law/a-law, G.722 wideband, Opus fullband (multicast)
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SIP Extensions: 50 Page + 10 Emergency Alert + 10 Ring
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Multicast: 50 zones, send & receive
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Outputs: RJ11 telephone (talk battery emulation), balanced 8Ω speaker output, balanced line out (terminal block), 3.5 mm aux out
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Inputs: Supervised relay input (dry contact)
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Relay Output: Max 30 V / 50 mA (normally open)
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Audio Storage: 1 GB for WAV/MP3 files
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Dimensions: 6.75 × 4.3 × 1.18 in (17.2 × 10.9 × 3.0 cm)
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Weight: 0.9 lb (0.4 kg)
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Mounting: Snap bracket included
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Environment: 32–104 °F (0–40 °C), indoor dry locations only
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Compliance: RoHS, CE, FCC Class A, UL/CSA
Please see the Algo 8305 Datasheet for more details
