MC145572PB Freescale Semiconductor, MC145572PB Datasheet - Page 242

• Manufacturer Part Number: MC145572PB
• Manufacturer: Freescale Semiconductor

Specifications of MC145572PB

• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / Rohs Status: Not Compliant

CIDCW — Calling Identity Delivery on Call Waiting; a subscriber feature which allows for the display of the time, date, number,
and possible other information about the caller to the called party, while the called party is off–hook.
CLASS — Custom Local Area Signaling Service; a set of services, enhancements, provided to TELCO customers which may
include CND, CNAM, Message Waiting, and other features.
CLID — Calling Line IDentification; a subscriber feature which allows for the display of the time, date, number, and possible
other information about the caller to the called party.
CNAM — Calling Name Delivery; a subscriber feature which allows for the display of the time, date, number, and name of the
caller to the called party.
CND — Calling Number Delivery; a subscriber feature which allows for the display of the time, date, number, and possible other
information about the caller to the called party.
CODEC — COder–DECoder; the A/D and D/A function on a subscriber line card in a telephone exchange.
COFIDEC — COder–Filter–DECoder; the combination of a codec, the associated filtering, and voltage references required to
code and decode voice in a subscriber line card.
Common Mode Rejection — The ability of a device having a balanced input to reject a voltage applied simultaneously to both
differential–input terminals.
Companding — The process in which dynamic range compression of a signal is followed by expansion in accordance with a
given transfer characteristic (companding law) which is usually logarithmic.
Compander — A combination of a compressor at one point in a communication path for reducing the amplitude range of signals,
followed by an expander at another point for restoring the original amplitude range, usually to improve the signal–to–noise ratio.
Conference Call — A call between three or more stations, in which each station can carry on a conversation simultaneously.
CPE — Customer Premise Equipment; this could be a POTS phone, answering machine, fax machine, or any number of other
devices connected to the PSTN.
Crosspoint — The operating contacts or other low–impedance–path connection over which conversations can be routed.
Crosstalk — The undesired transfer of energy from one signal path to another.
CSN — Circuit Switched Network.
CTS — Clear to send; a control signal between a modem and a controller used to initiate data transmission over a communica-
tion line.
CVSD — Continuous Variable Slope Delta (modulation); a simple technique to converting an analog signal (like voice) into a
serial bit stream.
D3 — D3 channel bank; a specific generation of an AT&T 24–channel PCM terminal that multiplexes 24 voice channels into a
1.544 MHz digital bit stream. The specifications associated with D3 channel banks are the basis for all PCM device specifi-
cations.
D/A (digital–to–analog) converter (DAC) — A converter that represents a limited number of different digital input codes by a
corresponding number of discrete analog output values.
Data Compression — A technique that provides for the transmission of fewer data bits than originally required without infor-
mation loss. The receiving location expands the received data bits into the original bit sequence.
dB (decibel) — A power or voltage measurement unit, referred to another power or voltage. It is generally computed as:
dBm — An indication of signal power. 1.0 mW across 600 , or 0.775 volts rms, is defined as 0 dBm. Any other voltage level is
converted to dBm by:
dBmO — Signal power measured at a point in a standard test tone level at the same point.
where dBr is the relative transmission level, or level relative to the point in the system defined as the zero transmission level
point.
I–2
10 x log (P1/P2) for power measurements, and
20 x log (V1/V2) for voltage measurements.
dBm = 20 x log (Vrms/0.775), or
dBm = [20 x log (Vrms)] + 2.22.
i.e., dBmO = dBm = dBr
Freescale Semiconductor, Inc.
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MC145572
MOTOROLA