SI2493-C-FT Silicon Laboratories Inc, SI2493-C-FT Datasheet - Page 134

• Manufacturer Part Number: SI2493-C-FT
• Description: 56 KBPS, V.92 ISOMODEM SYSTEM-SIDE - LEAD-FREE TSSOP 0 TO 7
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-C-FT

• Mfg Application Notes: SI2493/57/34/15/04, Appl Note AN93
• Data Format: V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, Bell 212A
• Baud Rates: 56k
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN93
component values were installed and that there are no
manufacturing problems, such as solder bridges, cold
solder joints, or missing components.
Functional testing can be used to test special features,
such as intrusion detection, caller ID, and overcurrent
detection. An intrusion can be simulated by placing a
1 k Ω resistor across TIP and RING through a relay.
Caller ID testing requires special test equipment, such
as the Rochelle 3500 or Advent AI-150.
Many manufacturers choose to use built-in self-test
features, such as the &T3 Loopback test described
above. Others do a complete functional test of the
modem by originating and answering a call and
successfully passing a data file in each direction. This
process
functionality, the associated external components, and
the software controlling the modem. This test can be
done with a modem under test (MUT) and a known-
good reference modem or between two modems under
test. Testing two modems under test at once reduces
test and setup time. Modem operational testing is time
consuming and adds to product cost. It is up to the
manufacturer to determine whether operational testing
is warranted.
Analog modems (Bell 103 through V.34) can be tested
by connecting the modems through a telephone line
simulator, such as Teltone TLS-3. A call can be placed
or received in either direction at the speed set in the
modems. A test script must be written for a computer to
control the dialing, monitor the call progress, send a file,
and compare the received and sent file. Figure 24
illustrates this test configuration.
134
Teltone TLS 3
Figure 24. Bell 103–V.34 Modem Functional
tests
the
Test Connection
modem
Reference Modem
Modem Under
Test
and
line-side
Computer
Test
chip
Rev. 0.9
V.90 modems must be tested with a digital modem,
such as the USR Courier I. If you do not use a digital
modem as illustrated in Figure 25, the highest connect
speed a V.90 modem will support is 33.6 kbps. A call
can be placed or received in either direction at the
speed set in the modems. A test script must be written
for a computer to control the dialing, monitor the call
progress, send a file, and compare the received and
sent file. Figure 25 illustrates this test configuration.
Table 91 compares the coverage of &T2, &T3, and full
bidirectional functional testing.
3.5.19.3. Compliance Testing
Regulatory compliance testing requires the modem to
be configured in specific ways and controlled to perform
specific operations necessary to make required
measurements. Compliance testing commands and
configuration information are provided.
Some helpful commands for conducting compliance
testing on the Si2493/57/34/15/04 are listed in Table 92.
The modem register defaults configure the modem for
FCC operation.
ILS 2000
Teltone
Figure 25. V.90 Modem Functional
ISDN
Terminal
Adaptor
Test Connection
ISDN
ISDN
Analog
Modem Under Test
ISDN Modem
Computer
Test