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Chapter 1: Understanding HDSL and the Express L768/L1.5
61202192L1-1 Express L768/L1.5 User Manual 11
Rear Panel
The Express L768/L1.5 has one RJ-45 jack, labeled HDSL, on the rear panel for
network connection (see Figure 1-6). There are two sets of switches on the back
panel. The TO HUB/TO NIC switch allows the Express L768/L1.5 to connect
directly to a Network Interface Card (NIC) or a HUB without the need for spe-
cial cabling. The OFF/ON switch block is for factory default and firmware
downloading. With switch 1 in the up or OFF position, the Express L768/L1.5
will immediately go into a download mode when power is enabled. Switch 1
must be in the down or ON position in order to boot up normally. Switch 2 in
the up or OFF position will force the entire configuration to be factory default-
ed.
The Express L768 transfers data up to 768 kbps over a two-wire facility. The
Express L1.5 transfers data up to 1.536 Mbps over a four-wire facility. This
type of service is a permanent connection between endpoints or between the
unit and the Frame Relay cloud. It is sometimes referred to as a leased connec-
tion, a dedicated connection, a nailed-up connection, or a private circuit.
Leased connection or leased line is used in this manual to represent these types
of services.
Figure 1-6
Express L768/L1.5 Rear Panel
Configuration
The Express L768/L1.5 is configured using a menu-based interface. This in-
terface can be accessed via the maintenance port using any asynchronous
VT 100 terminal or personal computer running a terminal emulation program,
or via the LAN using a Telnet client program. To use the Telnet interface, the
Express L768/L1.5 must first have an IP address programmed into it via the
maintenance port. The factory default is 10.0.0.1.
1
O
HDSL
OFF
ON
EIA23210 BASE TPOWER
1234
TO
HUB
TO
NIC
1202192L1/1202192L2