Loading...

b8zs binary 8 zero substitution line

B8ZS (Binary 8-Zero Substitution) Line Coding diagram. Whenever 8 consecutive zeros appear in the DS1 bit stream, this B8ZS code (with two intentional bi-polar violations) is inserted in order to ensure "minimum ones density".


01.01.1970
Loading...

Related Pictures & Images

TPI-90 Digital Data Service Test Set used for testing DS0 DDS Special ...

TPI-90 Digital Data Service Test Set used for testing DS0 DDS Special Service circuits.


04.07.2015 0

TPI 108/109 RT II Data Test Unit used to test DS0 DDS (Digital Data Se...

TPI 108/109 RT II Data Test Unit used to test DS0 DDS (Digital Data Service) Special Service circuits from the C.O. (circa 1980s)


10.08.2015 0

Diagram showing the transmit and receive pins for a DS1 RJ48C jack.

Diagram showing the transmit and receive pins for a DS1 RJ48C jack.


25.12.2017 0

Halcyon 520B3 Universal Test Set used for DS0 analog Special Service c...

Halcyon 520B3 Universal Test Set used for DS0 analog Special Service circuits (circa 1980s).


10.08.2015 0

Diagram showing the transmit and receive pins for a DS1 RJ48X jack.

Diagram showing the transmit and receive pins for a DS1 RJ48X jack.


25.12.2017 0

PSAP (Public Safety Answering Point) dispatcher position - circa 2006.

PSAP (Public Safety Answering Point) dispatcher position - circa 2006.


02.02.2013 0

Genicom 930 printer used in various PSAP (Public Safety Answering Poin...

Genicom 930 printer used in various PSAP (Public Safety Answering Point) locations - circa 2004.


02.02.2013 0

Illustration of running a BERT (Bit Error Rate Test) test from the Cen...

Illustration of running a BERT (Bit Error Rate Test) test from the Central Office to a looped-up T1 line Smart Jack NIU (Network Interface Unit).


25.12.2017 0

PSAP (Public Safety Answering Point) 911 dispatcher display position -...

PSAP (Public Safety Answering Point) 911 dispatcher display position - circa 2006.


02.02.2013 0

Adtran TA3000 DS3 Multiplexer equipment.

Adtran TA3000 DS3 Multiplexer equipment.


05.07.2015 0

Various types of fiber optic cable connectors.

Various types of fiber optic cable connectors.


25.12.2017 0

Diagram illustrating how T1 circuits are wired into DSX-1 jacks (c2001...

Diagram illustrating how T1 circuits are wired into DSX-1 jacks (c2001).


25.12.2017 0

One type of Fiber Optic connections.

One type of Fiber Optic connections.


25.12.2017 0

Lucent DDM2000 Multiplexer.

Lucent DDM2000 Multiplexer.


29.12.2016 0

First page of an example Special Services Service Order (c2004).

First page of an example Special Services Service Order (c2004).


25.12.2017 0

Diagram illustrating how cable binders are wired into T1 Repeater Appa...

Diagram illustrating how cable binders are wired into T1 Repeater Apparatus Case.


25.12.2017 0

Diagram of T1 line between serving C.O. and customer premises.

Diagram of T1 line between serving C.O. and customer premises.


25.12.2017 0

Working Plain Old Telephone (POTS) Channel Units and Special Services ...

Working Plain Old Telephone (POTS) Channel Units and Special Services Channel Units in a SLC-5 system.


24.10.2015 0

PSAP (Public Safety Answering Point) Key Telephone set - circa 2006.

PSAP (Public Safety Answering Point) Key Telephone set - circa 2006.


02.02.2013 0

1970 Southern Bell paycheck stub. Paid $293.60 for two weeks (80 hours...

1970 Southern Bell paycheck stub. Paid $293.60 for two weeks (80 hours) work.


09.11.2016 0