An intercom can provide a home’s
There are three basic types of intercom systems:
These types of intercom systems are not
HomePNA intercoms These types of independent intercoms communicate through a home’s existing telephone wires and the users speak through standard telephone handsets. The intercom action is started by pressing a certain sequence of keys or the number of a special station number on a standard telephone. These systems, like the doorway system shown in Figure 27-15, allow a person arriving at a home’s doorway to place a telephone call into the home and ring the phones with a unique ring. This provides both security and convenience to homeowners.
Figure 27-15: A doorway telephone intercom unit
These types of intercoms communicate over AC electrical lines and
Wireless independent intercom systems are
Stand-alone intercoms are self-contained systems that communicate over their own dedicated wiring. These types of systems have been, and still are, somewhat popular in homes. In addition to allowing a home’s occupants to communicate room-to-room, they can also include doorway units and master unit options that can include a radio receiver and a tape or a CD player that plays music throughout the intercom system
Figure 27-16: A stand-alone intercom master unit with a CD player
Some homeowners prefer to use standard telephones throughout their home and install a stand-alone intercom system.
Telephone-based intercoms Using the existing or standard telephone wiring and standard phones in a home, a doorbell intercom unit, like the one shown in Figure 27-17, can be installed to enable the doorbell unit to ring a unique ring throughout the home on standard telephones and provide intercom service between the door and the telephones.
Figure 27-17: A door intercom that connects into a home’s telephone system
Photo courtesy of LocalPlex.
The design process for residential telephone systems includes telecommunication wiring schemes, outlet boxes, wire termination,
The telephone wiring inside a home is the responsibility of the
There are four basic elements to a home telephone system: structured wiring, outlet jacks, punchdown or distribution blocks, and phone devices. Wiring installed by the telephone company can include 25-pair cable, satin cord , or four-conductor station wire.
Structured wiring support for a telephone system must address standard phone outlet wiring, structured wiring cable, punchdown/distribution blocks, and connections to the demarc.
Modular jacks are common in most existing
A KSU-based telephone system has its own separate controller that provides many of the same Telco subscriber services to the telephones in the home. The features provided by a residential KSU system include the capability to connect to standard telephones, voice-messaging (voicemail), station-to-station intercom support, auto-attendant,
There are three basic types of intercom systems: independent intercoms, stand-alone, and telephone-based intercoms. The most common types of independent intercoms are: HomePNA intercoms, PLC intercoms, and wireless intercoms. Stand-alone intercoms are self-contained systems that communicate over dedicated wiring. Telephone-based intercoms allow for intercom service between the doorbell and the house telephones.
Under a structured wiring approach, telephone systems should be installed using what wiring scheme?
What device is placed at the center of the structured wiring for a telephone system?
Telephone key set
Virtually all household wiring standards require the use of what type of wiring?
UL Category verified
A type of telephone system that is implemented on a central control unit that supports standard telephones or proprietary phones is a/an:
Which of the following is not a type of intercom system?
Which of the following should be done before making any programming changes to a KSU system? (There may be more than one answer.)
Complete features worksheet
Remove default programming
What cable is typically used to connect a telephone key set to a wall outlet?
Which of the following is not a type of outlet jack commonly associated with telephone connections?
What do the terms Tip and Ring refer to?
Incoming signal and bell
Positive and negative
Ring and busy tones
Dial and busy tones
How many phone lines can be supported by a single run of Cat 3 or Cat 5 cable?
D. Structured wiring is installed using a star topology. The other choices listed can be used for data networks, but aren’t recommended for residential wiring.
The other choices listed should be configured as
Category verified cable has been
B. A KSU is a central controller device that supports the functions of the telephone units connected to it.
D. A KSU is a type of telephone system. The other choices are all types of intercoms.
A and B. Prior to making any programming changes to a KSU, you should interview the homeowners and record their desires on a KSU system worksheet that includes the features of the master unit and each of the telephones.
This flexible pre-configured wire is the common standard for outlet-to-station connections. Station wire, if used, is used for horizontal cabling; coaxial cable is rarely used in voice applications (although it could be); and zip wire is
A. F-type connectors are associated with coaxial cabling. Inline, though not mentioned in the chapter, is used to connect two RJ-11 connectors together.
B. At one time, these terms may have had other purposes, but today they represent only positive and negative voltage.
C. A four-pair UTP cable is able to support as many as four phone lines.