ADTRAN Express 3000 SP, Руководство пользователя

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61203153L3-20 Express 3000 SP User Manual 1-1
Chapter 1
Overview
The ADTRAN Express 3000 SP™ is a stand-alone ISDN modem that
is ideal for remote access and Internet connectivity. The Express 3000
SP transmits data at speeds up to 230.4 kbps when using hi/fn com-
pression and up to 512 kbps when using Microsoft compression. The
Express 3000 SP includes ISDN terminal adapter and network termi-
nation functionality, eliminating the need for an external NT-1 device.
LIFE LINE POTS
This is the mode of the Express 3000 SP when local power has been lost
and it is powering itself off of the network interface span. Local power
is defined as the DC voltage coming from the AC to DC converter
plugged into an AC outlet in the user’s home or office. When local
power is lost, the Express 3000 SP automatically puts itself into a span
power mode (assuming the unit is connected to the appropriate net-
work line capable of providing span powering). In this span power
mode, the unit must become extremely low power, and the following
events occur:
• The EIA-232 interface is shut down. No EIA-232 data from any
attached DTE passes through the unit.
• The POTs interface defined as the Life Line Phone through the VT
100 menu option or the AT S-register 68 remains operational,
while the other POTs interface is disabled.
• All LEDs remain off except the green LED depicting the Life Line
Phone selection.
• The network interface stays in sync with the switch.