The Courier 1-5
V.Everything
The Courier provides full support of the V.34 standard, V.Fast
Class, V.32 terbo, and many other modulation schemes, spanning
the range of speeds between 33.6 Kbps and 300 bps. We call this
unique combination of abilities V.Everything. See the
Compatibility section in Appendix B, Technical Specifications, for
details.
Flash ROM Upgradability
Courier modems are software-upgradable using XMODEM file
transfers, allowing you quick, easy access to updates of the
Courier’s technology. See Chapter 17, Upgrading the Courier’s
Software, in the Courier Modems Command Reference manual.
Dial Security
The Courier’s dial security functionality is part of its operating
software, which allows you to control access at a modem-to-
modem level instead of using software that runs on the host
computer.
With Dial Security, you can prevent unauthorized access to a
system through the use of password prompting and dialback.
Refer to Chapter 9, Dial Security, in the Courier Modems Command
Reference manual.
Remote Configuration and Diagnostics
You can remotely configure and test the Courier. If you are a
network administrator supporting remote users, this feature can
save you time and money. Refer to Chapter 8, Remote Access, in
the Courier Modems Command Reference manual.
Adaptive Speed Leveling (ASL)
Couriers monitor line conditions while connected, and fall back
to the next lower speed—for example, 19.2K, then 16.8K in
V.32terbo mode—if conditions are poor. Couriers also detect
improved line conditions and shift upward to the next higher
speed. Transmit and receive channels adapt independently,
each detecting and adjusting to line conditions.
