Z0221500ZCO Zilog, Z0221500ZCO Datasheet - Page 24

• Manufacturer Part Number: Z0221500ZCO
• Description: Z02215 ONE-CHIP MODEM EVAL KIT
• Manufacturer: Zilog

Specifications of Z0221500ZCO

• Main Purpose: Telecom, Modem
• Utilized Ic / Part: Z02215
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Setup and Installation
Note:
The coefficients are determined and written by the filter design
program Biquad. Do not change these coefficients manually.
Call-Progress Detection Frequencies
The modem detects telephone network conditions during call establish-
ment using a biquad tone detector. This detector is configured by a set of
coefficients to detect tones within a frequency band.
Different frequency ranges may be specified to Dial tone and the other
call-progress tones (Busy, Congestion [fast busy], and Ring Back).
The parameter
cients. The call-progress detector follows the progress of the call after
dialing. Tones such as Busy, Congestion [fast busy], and Ring-Back are
detected by this detector.
The parameter
Dial tone detector detects the Dial tone before the call is dialed.
Ring Detection
The modem controller detects ring cycles by monitoring the RDET sig-
nal. If a ring frequency is within the RING_MAX_HZ and
RING_MIN_HZ, then a ring is detected; if not, a ring is not detected.
The parameter RING_MAX_HZ contains the upper bound of the ring sig-
nal in Hertz (cycles per second). The parameter RING_MIN_HZ contains
the lower bound of the ring signal in Hertz (cycles per second).
Line-In-Use
Line-In-Use sensing may be performed both before the modem takes the
telephone line OFF-HOOK to dial a number and during a connection.
Before Dialing
The LINE_SENSE_ENABLE parameter determines if the modem
checks that another telephone has the telephone line OFF-HOOK
DIAL_HQ*
CP_BQ*
PRELIMINARY
contains the call-progress tone-detector coeffi-
contains the dial tone detector coefficients. The
Evaluation Board User Manual
Z02215 Single-Chip Modem
UM002304-0802
18