Information; Technical Specifications; Modulation - 3Com 56K Command Reference Manual

E
Technical
Specifications

Modulation

T
ECHNICAL
Your modem uses multiple standard data communications protocols and
is also compatible with many nonstandard schemes. The following
schemes are supported:
This modulation
V.90
x2
ITU-T V.34
V.FC
V.32 terbo
HST
ITU-T V.32 bis
ITU-T V.32
ITU-T V.22 bis
Bell 212A
I
NFORMATION
Supports
ITU 56K standard, server capabilities. V.90 analog
clients can call into your Business Modem to get
56K connections
Up to 56 Kbps downstream and V.34 speeds upstream
33.6/31.2/28.8/26.4/24/21.6/19.2/16.8/14.4/12 kbps;
9600/7200/4800 bps asynchronous Trellis Coded
Modulation (TCM)
28.8/26.4/24/21.6/19.2/16.8/14.4 kbps asynchronous
TCM
21.6/19.2/16.8/14.4/12 kbps; 9600/7200 bps
asynchronous TCM; 4800 bps asynchronous Quadrature
Amplitude Modulation (QAM)
16.8/14.4/12 kbps; 9600/7200 bps asynchronous,
asymmetrical, 450 bps back channel with automatic
handshake adjustment to 300 bps TCM and QAM; 4800
bps asynchronous, asymmetrical, 450 bps back channel
with automatic handshake adjustment to 300 bps QAM.
14.4/12 kbps; 9600/7200 bps asynchronous TCM; 4800
bps asynchronous QAM
9600 bps asynchronous, TCM; 4800 bps asynchronous,
QAM
2400 bps asynchronous, QAM
1200 bps (also V.22) asynchronous, Differential Phase
Shift Keying (DPSK)