SI2457-D-FT Silicon Laboratories Inc, SI2457-D-FT Datasheet - Page 271

• Manufacturer Part Number: SI2457-D-FT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2457-D-FT

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

V.29 FastPOS Detailed Wave Files
The following is a wave file that shows a V.29 FastPOS SDLC transaction. It was captured with the program listed
above with a keep-alive loop. See "Appendix B—Line Audio Recording" on page 273 for details on how to capture
wave files.
V.29 Calling Tone
Calling modem is receiving
and sends to the DTE:
“Connect Packet” :
<EM><0xBE><0x24><0x24><EM><B1>
Then the SNRM Packet:
<0x30><0x93><EM><0xB1>
RTS (not
Answer Tone
(2225 Hz)
RTS) signal
DTE sends the calling
modem a UA packet
to transmit:
<0x30>(0x73><EM><0xB1>
Rev. 1.3
Calling modem is receiving.
Sends a Tx abort to DTE:
<EM><0xB2>
Then the received RR packet:
<30><EM><0xA0><EM><B1>
DTE sends the calling modem
an RR packet to transmit:
<30><EM><0xA0><EM><B1>
Repeat
AN93
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