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Overview
Hardware Overview
Figure 1-10. ADSL Modules
ISDN Module
The two-port ISDN module provides two Basic Rate Interface (BRI) lines for
dial-up connections. Each ISDN BRI line can deliver a maximum bandwidth
of 128 Kbps. (See Figure 1-11.) The S/T interface module is most often used
outside North America. The U interface module is used in WAN connections
in the United States and Canada.
Figure 1-11. ISDN BRI Modules
Backup Modules
A backup connection protects a company’s WAN operations against system
failure. Three types of backup modules are available for the ProCurve Secure
Router:
■ ISDN BRI S/T backup module for use outside of North America—supports
a 64 Kbps backup call or a bonded 128 Kbps call
■ ISDN BRI U backup module for use in the US and Canada—supports a 64
Kbps backup call or a bonded 128 Kbps call
■ VTU V.90 compliant analog modem—provides a connection speed of up
to 56 Kbps
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