Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 271)

AN93
Rev. 1.3 271
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.
RTS (not RTS) signal
V.29 Calling Tone
Answer Tone
(2225 Hz)
Calling modem is receiving
and sends to the DTE:
“Connect Packet” :
<0xBE><0x24><0x24>
Then the SNRM Packet:
<0x30><0x93><0xB1>
DTE sends the calling
modem a UA packet
to transmit:
<0x30>(0x73><0xB1>
Calling modem is receiving.
Sends a Tx abort to DTE:
<0xB2>
Then the received RR packet:
<30><0xA0>
DTE sends the calling modem
an RR packet to transmit:
<30><0xA0>
Repeat