3Com 56k User's Manual And Reference page 7

Back Channel Link Rates (Upload Speeds)
4800, 7200, 9600, 12000, 14400, 16800, 19200,
21600, 24000, 26400, 28800, 31200
V.34 Link Rates
4800, 7200, 9600, 12000, 14400, 16800, 19200,
21600, 24000, 26400, 28800, 31200, 33600
V.32 bis Link Rates
4800, 7200, 9600, 12000, 14400
Additional Link Rates
300, 1200/75 (V.23), 1200, 2400
Fax Link Rates
2400, 4800, 7200, 9600, 12000, 14400
Flash ROM Upgradable
56K Faxmodem supports software download
through flash memory. You can obtain the latest
features by downloading updates quickly and
easily.
Product Features
Front Panel Lights
PWR/Power
The modem is turned on.
CD/Carrier Detect
ON if modem receives a valid data signal (carrier)
from a remote modem, indicating that data
transmission is possible. Always ON if CD
override is ON (&C0).
RD/Received Data
Flashes when modem sends result codes or passes
received data bits from remote.
SD/Send Data
Flashes when computer sends a data bit to modem.
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