Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 129)

AN93
Rev. 1.3 129
In addition, a common Point-of-Sale V.22 Fast Connect Handshake Protocol (with transparent HDLC) requires
these additional settings:
<EM><rate> 0xBE not supported
Retrain/Rate Reneg com-
pleted, following octets
<tx><rx> indicate tx and rx
rates.
Yes Yes
0x20–1200 bps
0x21–2400 bps
0x22–4800 bps
0x23–7200 bps
0x24–9600 bps
0x25–12 kbps
0x26–14.4 kbps
0x27–16.8 kbps
0x28–19.2 kbps
0x29–21.6 kbps
0x2A–24 kbps
0x2B–26.4 kbps
0x2C–28.8 kbps
0x2D–31.2 kbps
0x2E–33.6 kbps
Notes:
1. U87 [10] = 1 Can be used to limit the transparency characters in the receive direction, to these four cases only.
2. The actual value represented in <octnum0><octnum1> = (octnum0 / 2) + (octunum1 x 64)
3. <EM><0x45> indicates that an unrecognized <EM> command was sent to the modem.
Table 87. Fast Connect Settings
AT+MS = V22 V22 Protocol
AT:U7A,3 Set Fast Connect, Transmit
HDLC Flags instead of Marks
during handshake negotiation.
Table 86. EM In-Band Commands and Statuses (Continued)
Command–
Indicator pair
Hex
Code
Transmit Direction Receive Direction
Supported
in
Transparent
Submode
Supported
in Framed
Submode