CS62180B datasheet(49/50 Pages) CIRRUS

49 / 50 page

zeros by the CS62180B if B8ZS

is enabled. The received B8ZS code is replaced

with eight zeros before any other processing is

done on the incoming data. Note also that even

if B8ZS is not enabled, the CS62180B

monitors the incoming signal for B8ZS codes,

and reports them on RSR.2 (if CCR.6 = 0).

A serious provisioning problem exists in the net-

work regarding B8ZS. It is sometimes difficult to

selectively turn-on B8ZS on all segments of an

end-to-end path through the network, especially

when some equipment types, such as M13s,

sometimes require that all four lines on a line

card be configured the same way. It is thereby

highly desireable that all receivers in the network

be able to receive B8ZS independent of the pro-

visioning of B8ZS on the corresponding

transmitter.

Therefore, the CS62180B has its

B8ZS receiver turned on all of the time, and bit

CCR.2 controls only the B8ZS encoder in the

transmitter. The CS62180B reports B8ZS occur-

rences on RSR.2. B8ZS substitutions will not

increment the Bipolar Violation Count register.

Digital Milliwatt Code

The Digital Milliwatt code is the digital repre-

sentation of a 0 dBm0, 1 kHz signal. It’s used as

a test reference for calibrating channel bank

equipment as specified in AT&T Publication

43801.

CS62180B

DS225PP2

CS62180B 데이터시트(PDF) 49 Page - Cirrus Logic