Verilink AS2000: The Basics (880-502981-001) Product Manual Instrukcja Użytkownika Pobierz pdf (Strona 163)

Acronyms and Definitions

Verilink Access System 2000: Basics Glossary-43

secondary synchronization The first alternate source for clock

synchronization of the node.

SEFS See

severely errored framing

second (SEFS)

seized See

off-hook

select interval Option available to specify the

time interval for alarm

monitoring—from the most

current 15-minute time period to

the previous 24 hours.

Node

Manager

displays the available

time and most recent 15 minutes

as a bar and as a percentage.

Send Timing (ST) The transmit clock signal provided

by a DSU or multiplexer. In the

case of a Verilink DTE clock option;

a selection which causes the

sampling of transmit data during

the negative going transition of

the transmit clock.

SES See

severely errored second

(SES)

severely errored framing second (SEFS) The second in which two or more

framing bit errors occur within a 3-

millisecond period. For

Extended

Superframe Format (ESF)

, this

interval may or may not coincide

with an ESF (i.e, six framing bits).

severely errored second (SES) An SES is declared when 320 or

Extended Superframe

Format (ESF)

error events occur

within one second, or when an

out-of-frame second (OOFS)

occurs. One second contains 333-

1/3 Extended Superframes. As

defined by AT&T Publication

54016, a sequence of three

seconds will contain two

consecutive seconds of 333 ESFs

and one of 334 ESFs.

Serial Line Interface Protocol (SLIP) A protocol that allows a computer

to use the Internet protocols over

RS-232. Often used over dial-up

modem connections.

SF See

Superframe (SF/D4)

shelf controller The controller module used to

control the other modules in the

same shelf. In an NCM node, the

shelf controller could be another

NCM, or a DIDCSU, Dual CSU or

Quad/IMUX.

short-haul connection 0 to 633 feet.

1 2 ... 158 159 160 161 162 163 164 165 166 167 168 ... 178 179

Komentarze do niniejszej Instrukcji

Brak uwag

Verilink AS2000: The Basics (880-502981-001) Product Manual Instrukcja Użytkownika Strona 163

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Sprzęt komputerowy Verilink AS2000: The Basics (880-502981-001) Product Manual