Host Accelerated Modem 56K V.92 Chipset — 536EPXX
Preliminary Datasheet
Intel Confidential
23
7.1.5
Videoconferencing (V.80) Support
The 536EPXX supports the ITU-V.80 recommendation. This option ensures compatibility with
host-based H.324 videoconferencing application software. The 536EPXX chipsets support both
transparent and framed submodes of the V.80 synchronous access mode, plus Voice Call First and
full-duplex speakerphone.
7.1.6
Loopback Test Modes
In all modes except V.92, modem-to-DTE and modem-to-modem communication integrity can be
tested with loopback tests. The AT&T1 command initiates the local analog loopback test.
7.2
Other Features
7.2.1
Full-Duplex Speakerphone
The 536EPXX supports full-duplex speakerphone with internal adaptive echo cancellation. Phone
users can talk simultaneously without the remote user hearing an echo.
7.2.2
Transmit Levels
The factory default transmit level for V.92 and V.34 transmission is
−
10 dBm
±
1 dB at Tip and
Ring. Data and fax use separate transmission levels. The transmit level can be programmed using
the international configuration utility.
Important:
Current download speeds are limited to 53.33 kbps due to FCC rules that restrict modem power
output.
7.2.3
Transmit Tone Levels
The modem generates DTMF, answer, call, and guard tones. The specifications for each tone are
provided in
Table 13
and
Table 14 on page 24
. The transmit level can be programmed using the
Intel configuration utility.
7.2.4
Receive Level
The receiver can accommodate a receive signal from
−
9 dBm to
−
43 dBm. The DCD (data carrier
detect) function is activated at
−
43 dBm and above; it is deactivated at
−
48 dBm and below.
7.2.5
Receiver Tracking
The receiver compensates for up to
±
7 Hz of carrier-frequency offset in V.34 mode.
7.2.6
Equalizers
Automatic adaptive and compromise equalizers are provided to compensate for line distortions.
