Shared Flashcard Set

Details

V-2 Sec. 1
5Level
31
Computer Science
Professional
10/06/2008

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Cards

Term
What is the DTE?
Definition

Any device which accepts and/or sends information to a computer program that is implemented by data communication.

Term
What are some common data terminal equipment devices?
Definition
Terminal, client, printer, host, and server.
Term
What is the DCE?
Definition

Communication equipment that assists the DTE in sending or receiving data messages over data circuits.

Term
What are the two types of modems?
Definition
Dial-up and dedicated.
Term
What is one principal function of a CSU?
Definition

To provide a barrier for electrical interference from either side of the unit.

Term
What is the main function of a DSU?
Definition

To adapt the digital data stream produced by the customer equipment to the signaling standards of the telephone carrier equipment and vice versa.

Term
What are two types of encryption?
Definition
Data and voice encryption.
Term
What are two key devices used for data encryption?
Definition
The TSEC KIV-7 and the TSEC KIV-19
Term
What two telephone devices are used for voice encryption?
Definition
The STU and the STE
Term
What are two types of data encryption fill devices?
Definition
The AN/CYZ-10/DTD and the SDS
Term
How can encryption be applied?
Definition

Link-by-link basis, end-to-end basis, or bulk encryption.

Term
What are the three types of patch bays found in most SCFs?
Definition
Audio, DS-X, and digital.
Term
What is the purpose of the audio patch bay?
Definition

To patch access to low speed voice and data to analog signals.

Term
What is on the tip of a patch cord when the other end is patched into the send equipment jack?
Definition
The output of the send communications equipment.
Term
What is one the tip of a patch cord when the other end is patched into the receive line jack?
Definition

The output of the receive wire line or multiplex equipment.

Term
What is the purpose of the DS-X patch bay?
Definition

To provide flexibility of associated T-1 and T-3 channels and equipment.

Term
What physical standards are used to wire the digital patch bay?
Definition
RS-232, RS-530, and V.35.
Term
When substituting a bad line or multiplex channel, what patches must you make to complete the transmit path of the circuit?
Definition

Patch a Bantam patch cord into the normal send equipment jack of the communications equipment. Patch the other end of the patch cord into the spare send line jack that is still operating.

Term
When substituting a defective modem, what patch must you make to complete the digital side of the circuit?
Definition

Use a digital patch cord to patch into the equipment module of the spare modem. Patch the other end of the patch cord into the normal line module that is still operating.

Term
By what two means are red and black areas of a control facility kept separated?
Definition
Physically and electrically.
Term
Why are red and black areas physically separated?
Definition

To prevent people from inadvertently making connections between the two areas with a patch cord which could result in a security compromise of classified messages.

Term
When establishing an on-call patch, what do you, as a system controller do, PRIOR TO turning the circuit over to the local user?
Definition

First ensure continuity and quality of circuitry to the distant-end user.

Term
Who authorizes permanently designated on-call circuits?
Definition
The TSO.
Term
What is the input frequency and voltage of most AC powered communications equipment in the United States?
Definition
60 Hz, 120 volts.
Term
What is the source of power for the SCF's primary power source?
Definition

Commercial power bought from a local utility company or power generated by a base power plant.

Term
What types of items are not normally connected to the UPS?
Definition

Electrical wall outlets and most non-critical (non-critical load) lighting systems.

Term
What is the purpose of the rectifier?
Definition

To maintain a constant state of charge on the battery bank and supply power to the inverter during an AC input failure.

Term
After a UPS failure and the transfer of the load from the inverter output to the UPS bypass, what action must you take after you correct the malfunction?
Definition

Manually restart the UPS and activate a switch on the UPS control panel to transfer the critical load back to the inverter output.

Term
List the four primary systems of a generator.
Definition
Starting, cooling, fuel, and lube oil.
Term
What controls are located on the engine control panel?
Definition

Controls for starting and stopping the engine alarm curcuit indicating lights, and engine monitoring gauges.

Term
What is the purpose of the switchgear?
Definition

It connects the generator to the load by switching the facility's power feed from the commercial source to the generator.

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