8-15
Configuring Demand Routing for Primary ISDN Modules
ProCurve Secure Router ISDN Modules
Primary ISDN Modules
For primary WAN connections, ProCurve Networking currently offers two
types of modules:
■ ISDN BRI U module—used in the United States and Canada
■ ISDN BRI S/T module—used in all other countries
Both of these ISDN modules support the following standards:
■ National ISDN-1—Defined in the mid 1990s by the National Institute of
Standards and Technology (NIS) and Bellcore (now called Telcordia),
National ISDN-1 outlines a common set of options that ISDN manufactur-
ers and public carriers must provide.
■ Northern Telecom Digital Multiplex System (DMS)-100—DMS-100 is
another standard for transmitting voice and data over an ISDN line.
■ AT&T 5ESS—AT&T switches use Lucent signaling.
In addition, the ISDN BRI S/T module supports:
■ Euro-ISDN—Also called Normes Européennes de Télécommunication 3
(NET3), Euro-ISDN was defined in the late 1980s by the European Com-
mission so that equipment manufactured in one country could be used
throughout Europe.
Note Because the two-port ISDN modules have a single TDM clock, you cannot use
one module to connect to two separate service providers. If you lease ISDN
lines from two different service providers, you will need to use two separate
ISDN modules—either 2 two-port ISDN modules or 1 two-port ISDN module
and one ISDN backup module.
Table 8-3 lists the supported ISDN switches, the classifications, and electrical
standards for each ISDN module.
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