... More about Professional Grade Bypass Amplifiers
In cable telephony installations, it is necessary to ensure that, even if power is lost, the Multimedia Terminal Adapter (MTA), which is the interface between the telephones in the home and the cable
operator’s network, can still send and receive signals so emergency telephone calls can still be made. PCT Bypass RF amplifiers are specifically engineered for use in cable telecommunications networks providing cable telephone services. They will have a port that is specifically marked as the “bypass port”, frequently by saying “To eMTA” on the label. Although it can be used to provide signals to a TV set, this port is specifically designed for the cable modem or the MTA (Multimedia Terminal Adapter – the device cable operators use to provide cable telephony service) as it always has signal, even when the power is lost.
There are two basic types of bypass amplifiers: active bypass and passive bypass. The PCTVB series bypass amplifiers are considered active bypass amplifiers. There are two relays that will route the signal around the amplifier if power is lost. When the unit is powered, the TV signals go directly into the amplifier in the normal fashion, and the MTA or cable modem is connected to the designated bypass port. If power is lost, the relays transfer the signals over to the bypass path, which goes around the amplifier and directly to the designated bypass port. This ensures that emergency telephone calls can be made even when power is lost.
The PCTVC series bypass amplifiers are considered passive bypass amplifiers. There is an internal two-way splitter directly on the input port of the amplifier housing. One output of this splitter goes directly to the bypass port, and the second output of the two-way splitter provides the input to the actual amplifier. This ensures that emergency telephone calls can be made even when power is lost.
All PCT Bypass RF amplifiers are professional grade and meet stringent US and international standards, including those developed by the Society of Cable Telecommunications Engineers (SCTE), who creates international standards for many TV signal distribution products.