HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 301

Configuring the Data Link Layer Protocol for E1, T1, and Serial Interfaces
To connect the Atlanta office to the London office, the company chose Frame
Relay, which allows them to cross country borders at a more affordable cost
than dedicated T1-and E1-carrier lines.
The company uses ADSL for its Internet connection at the Atlanta office. (For
information about ADSL, see Chapter 7: ADSL WAN Connections.)
San Francisco
Router
T1 with
HDLC
T1 with Frame
10.1.1.1 /30
Relay
10.5.5.1 /30
Atlanta
Router
Figure 6-11. Example WAN Using Carrier Lines with HDLC and Frame Relay
Figure 6-12 shows the configurations for the T1, HDLC, and Frame Relay
interfaces, as they appear in the running-config for the Atlanta router.
Frame Relay
Network
Router
ADSL Annex A
Example Networks
London
Router
E1 with
Frame Relay
ISP
Internet
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