Exam 18: Pstn Central Office

________ is a term used in telecommunications to describe ladder racking, relay racks, and other miscellaneous support structures.

In order for a switch to operate, power is available from the following sources in which order of operation and backup?

The function of a typical network-monitoring OSS is to:

One of the costliest considerations in a switch center is the unit necessary to maintain the room's ________.

A false floor is a very convenient and preferred alternative to using ironwork.

All of the following factors are important in choosing the correct DS-1 DSX panel except:

The purpose of a cross-connect panel is to provide a(n) ________ meeting point for the circuits coming into and leaving the site.

The CLEC switch, unlike the ILEC's central office switch, does not have direct line side terminations to the subscribers but instead connects to special equipment located in a cage in the ILEC's serving central office.

The "brains"of the multiplexer is:

Switches today are connected using which of the following?

The special services block and the alarm block are both located on the vertical side of the MDF.

The main difference between a DSX-1 and a DSX-3 is that a DSX-1 panel terminates coaxial cable connections and the DSX-3 panel terminates twisted copper pair connections.

The size of the switch varies depending on the:

The difference between the LD switch site and the ILEC and CLEC switch sites is that the long distance switch site does not have a(n) ________ because it does not have line side terminations.

The ________ of the switch is the term used to define the square footage it requires.

Most switches only require connections to other switches.

A typical transmission room holds a variety of multiplexers, from DS-1 upstream channel banks to high-end DWDM multiplexers, and the variety of multiplexers found there depends on the ________ speeds needed between sites.

All of the following are true of both the LD switch site and the class 5 switch site except:

The acronym used for the center that is the hub of activity at most switch sites, typically located next to the switch room and housing a computer terminal that is directly connected to the switch, is ___________.

Most telecommunications equipment, including the switch, requires a(n) ________ volt feed.