Algo 8305 Multi‑Interface IP Paging Adapter

The Algo 8305 Multi-Interface IP Paging Adapter is the definitive solution for organisations looking to unify their trusted analogue audio hardware with the power of modern IP networks. Rather than undergoing a costly and disruptive "rip-and-replace" of your existing infrastructure, the 8305 allows you to seamlessly integrate legacy amplifiers and speakers into your VoIP, UCaaS, or Hosted PBX environment. By transforming traditional paging systems into intelligent, SIP-compliant endpoints, the Algo 8305 delivers enhanced control, automated scheduling, and crystal-clear communication across your entire facility - ensuring your safety alerts and daily announcements are more reliable than ever before.

Modernise Your Paging Infrastructure

The Algo 8305 acts as a powerful bridge, allowing you to bring traditional, legacy paging systems into the digital age. Featuring three versatile connection points—a telephone port for paging amplifiers, an 8 Ω output for self-amplified speakers, and a standard line output—the 8305 ensures your hardware investment remains relevant. As a fully SIP-compliant adapter, it seamlessly integrates existing analogue equipment with modern VoIP and UCaaS platforms, while multicast support allows legacy and IP devices to function in perfect harmony.

Precision Automation & EventScheduling

Take the manual work out of your daily operations with the Algo 8305’s intuitive web-based scheduler. Easily automate routine announcements, shift changes, or school bells with a few clicks. Whether you need a single daily chime or complex, multi-event scheduling for holidays and safety reminders, the interface makes management effortless. For critical situations, emergency alerts can be triggered instantly via a designated SIP extension or through physical hardware—like an emergency button—connected to the relay input.

Scalable Growth Without the Stress

Built for flexibility, this PoE-powered device leverages SIP, multicast, and smart relays to unify disparate communication services. The Algo 8305 is designed to grow with your business; as you upgrade your facilities, adding new devices or expanding your paging reach is straightforward. By using open APIs and smart connectivity, you gain granular control over your entire audio network, ensuring your communication system is as scalable as your organisation.

Optimised for Paging, Not FXS

Please note that the Algo 8305 is specifically engineered to interface with paging amplifiers. It is not designed for connection to FXS ports on a phone system or to function as a standard ATA (Analogue Telephone Adapter).

One-Way Audio Transmission

This device is purpose-built to provide a high-quality, one-way audio path to your legacy paging system. It does not support two-way (talk-back) communication.

Power Requirements

As a PoE device, the 8305 requires a standard PoE network switch or a PoE injector for operation (not included).

Key Features

• SIP Compliant, PoE
• Secure SIP Using TLS and SRTP
• Multicast Capable
• Telephone Port that Emulates an Analogue Telephone (Connects to Paging Systems that Provide a Talk Battery Pair)
• 8 Ω Output Port (Connect to Self-Amplified Speakers)
• Schedule Bells, Tones and Automated Announcements
• Wideband HD Audio (G.722 Voice Codec) for High Intelligibility Speech
• Configure up to 50 Page Zones

Technical Specifications

Input / Output

• Telephone Port - Emulates an Analogue Phone, Capable of Ring Detection and On-Hook / Off Hook
• 8 Ω Output - Balanced and Isolated Wire Pair Output to External Self Amplified Speakers, Load Impedance of 2 kΩ down to 8 Ω, Max Output of +3 dBm @ 8 Ω, +1.5 dB Higher at 2 kΩ - Intended use is Nominal 2 kΩ or 1 kΩ Self Amplified Speakers Connected in Parallel to a Total Minimum Resistance of 8 Ω
• Line Out - Balanced and Isolated Wire Pair Output to External Amplifier, Output Level Defined Using Web Interface, Polarity Independent
• Relay Input - Normally Open or Normally Closed Dry Contact with Supervision,  Compatible with Algo 1202 Call Button, 1203 Call Switch, 1204 Volume Control or EOL Resistor Termination
• Relay Output - Max 30 V 50 mA (Normally Open)
• Aux Out - 3.5mm Jack for Analogue Line Level Input for Compatible PC Speakers or Headset, Non Isolated

Power

• Power Source - PoE (IEEE 802.3af Class 0) 48 V, 15.4 W
• Max Power (At Device) - 4W
• Idle Power - 2W

SIP

• SIP Extensions - 50 Page, 10 Emergency Alert, 10 Ring
• SIP Signalling / Transport Protocols - UDP, TCP, RTCP
• Security - TLS, SRPT, Mutual Authentication
• Audio Codecs - G.711 u-law, G.711 A-law, G.722 Wideband

Multicast

• RTP Multicast - Send and Receive 50 Zones
• Audio Codecs - G.711 u-law, G.711 A-law, G.722 Wideband, Opus Fullband

Compatibility

• Restful API
• Poly Group Page™
• Singlewire InformaCast® (Additional License  Required)
• Intrado Revolution®
• Microsoft Teams®

Configuration & Provisioning

• Configuration - Web Interface or Provisioning Server
• Web Interface - HTTP, HTTPS
• Provisioning -  TFTP, FTP, HTTP, HTTPS, DHCP Options 66, 150, 160, Reboot via SIP ‘check-sync’
• ZTP - Supported
• Supervision - Compatible with Algo Device Mangement Platform (ADMP), Algo 8300 IP Controller, any Third Party SNMP Monitoring Software, and RTCP

Networking

• Networking - IPv4, IPv6, DHCP, VLAN, MDNS
• Link Layer - LLDP, CDP
• Security - IEEE 802.1X
• QoS - DSCP
• NAT - STUN, TURN, CRLF Keep Alive, SIP Outbound
• Address Resolution - DNS, SRV Record
• Redundancy - Secondary and Tertiary SIP Server
• Time - NTP Server (up to four)

Audio

• Audio Memory & Format - 1 GB Audio Storage for WAV or MP3 Files
• Audio Controls - Volume, AGC, Latency, LF Cut
• Anti-Feedback Delay - Cache to Memory and Release
• Audio Delay - Programmable 1-1000 ms Synchronisation Delay

Package Contents

• Algo 8305 Multi-Interface IP Paging Adapter
• Wall Mount Bracket with Screws
• Network Cable
• 2 Pluggable Terminal Blocks
• Ouick Start Guide