The eS8-TB4-MA Talkback Master Speaker is a network based 8” speaker station that provides two-way intercom communications and receives paging announcements. The eS8-TB4-MA is available in two models: with a round baffle (eS8-TB4-MA-R) or with a square baffle (eS8-TB4-MA-SQ).
In addition, it has the ability to support up to four additional Satellite Speakers that connect directly to the eS8-TB4-MA. This allows you to distribute an audio broadcast over a larger area, making it a perfect solution for larger rooms where a single speaker does not provide adequate coverage.
While the audio signal is broadcast through multiple speakers, the source of the talk back audio from the room is from only a single eS8-TB4-MA speaker, strategically located in the room to provide the best coverage. The single microphone picks-up audio that is predominantly the talker’s voice, minimizing the ambient noise. This optimizes the signal to noise of the talk audio from the room, ensuring maximum intelligibility.
Satellite Speakers used with the eS8-TB4-MA are 25V speakers supporting a total speaker load of 4 watts. Speakers such as Telecor’s STB-10 are recommended for Satellite configuration.
The eS8-TB4-MA uses Power-over-Ethernet technology, Just Plug It In!™ design, and a decentralized network structure to ensure easy wiring and simplified network planning. The use of Power-over-Ethernet technology allows the eS8-TB4-MA to be plugged into a PoE network switch to supply both power and data. The simplicity of Telecor's Just Plug It In!™ design means the eS8-TB4-MA does not require any network configuration or administration, eliminating IP address and DHCP server requirements. The decentralized network structure means no head end, central server or controller equipment is required to operate the network. Once plugged into the LAN, the eS8-TB4-MA is immediately functional. It can establish two-way audio communications with eConsoles as well as
receive pages and audio source distributions from devices in the network.
Speech is transmitted through the speaker in crystal-clear HD Audio. Audio is transmitted in the frequency range from 50 Hz to 7 kHz while using 150 kbps of bandwidth during a call (128 kbps audio stream and overhead resulting in 150 kbps per audio channel). The maximum audio output level is 95 dB at 3.3 feet (1 m). Audio between stations and consoles is non-blocking, allowing a virtually unlimited number of audio channels across the LAN and reducing or eliminating busy signals. The microphone includes a conditioned preamp with built-in compression and noise gate for excellent vocal clarity and noise reduction.
The volume of the eS8-TB4-MA can be adjusted individually, by zone, or across the entire eSeries network via the ePort-MC Management Interface or eCI-MA Control Interface. Volume controls incorporated into certain eCS station models also allow a user to adjust the volume of a local eS8-TB4-MA. Volume levels can be set for specific functions: intercom, paging, emergency paging, and Public Channel operations.
The eS8-TB4-MA is fully supervised and monitored for network connectivity, call destination, and call station connectivity, which is consistent with the NEMA SB-40 standard for communication systems. If the eS8-TB4-MA’s network connection is lost, targeted e300 eConsoles will report that station as absent and
display its dial number. When the eS8-TB4-MA is used with call stations, the call-in destinations are monitored. If the device at a call-in destination loses network connectivity, the eS8-TB4-MA will automatically search for an alternate destination. If no other suitable call-in destinations exist, the call station will audibly and visually indicate an error. If a wiring fault is detected between a Call Station and the eS8-TB4-MA, the eS8-TB4-MA will audibly and visually indicate the error. The ePort logs the location, time, date and type of fault. The ePort, eLog, eCI and eAmplifiers can also generate an alarm tone.