Enterasys csx200 Benutzerhandbuch
CSX200 Firmware Support
CSX200 Installation Guide
2-9
The CSX200 supports one ISDN BRI line and either or both of the B channels for transferring
data. If the two B channels are used for separate connections, each provides up to 64 Kbps transfer
rate. Both channels can be used together to provide uncompressed data transfer at up to 128 Kbps.
The CSX200 can also transfer compressed data at up to 512 Kbps (after decompression).
data. If the two B channels are used for separate connections, each provides up to 64 Kbps transfer
rate. Both channels can be used together to provide uncompressed data transfer at up to 128 Kbps.
The CSX200 can also transfer compressed data at up to 512 Kbps (after decompression).
A network terminator device (NT-1) provides the interface between ISDN terminal (router)
equipment and the ISDN service provider. The CSX200 supports the WPIM-S/T by providing an
S/T interface that requires an external NT-1.
equipment and the ISDN service provider. The CSX200 supports the WPIM-S/T by providing an
S/T interface that requires an external NT-1.
The following telephone switch types are supported within the U.S.:
•
NET3 (European ISDN)
•
NET3SW (European Swiss Variant)
•
NTT (Nippon Telephone and Telegraph)
•
KDD (Kokusai Denshin Denwa Co. Ltd.)
•
French Delta (VN4) switches
HDSL
High data rate Digital Subscriber Line (HDSL) technology uses existing copper twisted pair cables
designed for conventional analog voice transmission from a telephone carrier servicing area as
low-cost alternative to fiber optic cables. HDSL provides high-speed full-duplex digital
transmission links of up to 1.544 Mbps.
designed for conventional analog voice transmission from a telephone carrier servicing area as
low-cost alternative to fiber optic cables. HDSL provides high-speed full-duplex digital
transmission links of up to 1.544 Mbps.
HDSL is a direct connection technology that allows connections to be made for distances of up to
12,000 feet over 24 American Wire Gauge (AWG) unconditioned twisted pair wire. To obtain the
Full T1 line Rate of 1.544 Mbps, two wire pairs are necessary (four wires). If one pair of wires is
used, the data rate is772 Kbps, equivalent to one-half of a T1 line.
12,000 feet over 24 American Wire Gauge (AWG) unconditioned twisted pair wire. To obtain the
Full T1 line Rate of 1.544 Mbps, two wire pairs are necessary (four wires). If one pair of wires is
used, the data rate is772 Kbps, equivalent to one-half of a T1 line.
Bridging and Routing
Bridging —
Bridging connects two or more separate networks together. The bridge examines a
portion of each network frame called the header. This header contains control information for the
frame. The bridge compares the destination address of the frame to a table of source addresses
(bridges dynamically learn the physical location of devices by logging the source addresses of
each frame and the bridge port the frame was received on in the source address table).
frame. The bridge compares the destination address of the frame to a table of source addresses
(bridges dynamically learn the physical location of devices by logging the source addresses of
each frame and the bridge port the frame was received on in the source address table).