Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
51
Country Configuration
The Z02215 contains modem controller code that is targeted to operate over a
North America-style telephone network with the DAA configuration illustrated in
the schematics at the end of this product specification. The customer may choose
to configure the modem for use on other telephone networks. This capability is
enabled by the addition of a serial EEPROM to hold various country tables. The
EEPROM may be omitted from the application if the customer chooses to operate
with the default North America-style parameters.
If an EEPROM is not desired, the country table can also be downloaded to the
Z02215 from the host and stored in on-board RAM.
The Z02215 provides a means of loading information into the EEPROM for setting
homologation or country approval tables. One way to set these tables is by choos-
ing the desired geographic region to be served in a DOS program, supplied by
ZiLOG, called Diplomat™. This program interfaces to the modem through the
serial port using hidden AT commands, allowing reprogramming of the EEPROM.
Typical Performance Data
The Bit Error Rate (BER) and Block Error Rate (BLER) curves in Figure 6 are rep-
resentative of a typical V.22 and V.22bis performance over a variety of signal-to-
noise ratio (SNR) conditions.
Modems usually exhibit lower bit error rates receiving in the low
band as opposed to the high band.
Note:
For each BER curve illustrated, one connection is made, after which the Adaptive
Equalizer (AEQ) was frozen. BER measurements are taken in 1 dB SNR steps
from low noise levels to high noise levels. These tests were conducted using a
Consultronics TCS500 Telephone Line Simulator and a Hewlett Packard 4951B
protocol analyzer/BERT tester, under the following conditions:
Line Simulation
Transmit Level
Receive Level
Data Transmitted
Number of Bits Sent
Bits per Block
AEQ
Flat
–10 dBm
–30.0 dBm
511 pseudorandom pattern
10,000,000 in V.22bis, V.22 and Bell 212A.
1,000
Frozen after link establishment
C-message
Noise Calibration
PS001907-0904
Country Configuration
ZILOG [ ZILOG, INC. ]
