Farallon Communications NetopiaTM manual Netopia Isdn PC Card Leds, Data Compression

OPERATION 45

DATA COMPRESSION

Data compression is a process where the effective throughput is increased by encoding data in such a way that fewer bits are required to represent it. Popular compression algorithms typically reduce the size of the data by half, effectively doubling the rate at which it is transmitted. And with four-to-one compression, the data rate may quadruple.

No configuration is required to enable the Netopia ISDN PC Card's compression functionality. Compression algorithms currently supported by the Netopia ISDN PC Card include LZS (STAC) and MPPC (Microsoft). If the system to which you are connecting supports one of these algorithms, it will automatically be used.

NETOPIA ISDN PC CARD LEDS

Some of the Netopia ISDN PC Card interface connectors have LED indicators that provide an instant status view. These indicators show the status of the connection to the remote device (B- channel) and the status of the link to the ISDN switch (D-channel). The following table lists the LED states and their meanings:

LED B	LED D	Description
Off	Off	The ISDN line is not activated.
Off	Blinking	The ISDN line is activated but not yet
		operational.
Off	On	The ISDN line is activated and operational, but
		the port is not connected.
Blinking	On	Attempting a connection with a remote device.
On	On	Connection established with either Multilink
		PPP, PPP, or V.120.
On	Blinking	A Multlink PPP connection was attempted, but
		only a single-link PPP connection has been
		established.
Blinking	Blinking	Indicates a problem.