6 Watt Paging and Loud Ringing Amplifier. Paging horn and power supply included. The CPA-7B features a low noise, high fidelity amplifier, providing 6 watts of power for a variety of telecom paging applications. It can also provide background music and night bell/common audible. In addition, multiple units may be daisy-chained for larger paging applications. Compatible with ringing C.O. lines, Centrex lines and analog PABX/KSU station ports as well as unused trunk inputs, the CPA-7B will also interface directly with standard paging ports. For loud ringing, the CPA-7B generates an adjustable loud warble from a dry contact closure, a ringing C.O. or a ringing analog PABX/KSU station. The CPA-7B is easy to install and can eliminate the installation of multiple bells, relays and paging cards. Applications Paging and loud ringing for systems with paging ports, analog station ports or trunk ports Paging and loud ringing for Centrex systems Remote paging from Centrex/C.O. Lines. Features 6 watts of paging power (powers 8 speakers) High audio fidelity with low noise amplifier 600 ohm audio output for cascading multiple CPA-7B's Includes (1) 8 ohm 25AE paging horn Day/night switchable for paging/loud ring Ringing/alert tone volume adjustment Paging volume adjustment Interfaces with ringing Centrex or C.O. lines, paging ports, unused trunk ports, or a ringing analog station port Background music is muted during page Provides Night Bell warble tone via contact closure or ringing Centrex/C.O. line or analog PABX/KSU station Provides page "Alert" tone before paging Adjustable ring trip paging time-out for auto disconnect 1 year warranty, Made in the USA.