
Configuring Dial Services
3-2
D Channel Support
The router supports full 16 Kb/s D channel signaling and call setup and tear down
between the router and ISDN switch. The D channel implementation complies
with ITU-T (formerly CCITT) 1988 recommendations Q.921 and Q.931, with
signaling support for the following countries:
• INS-64, KDD, and NTT for Japan
• TS013 for Australia
• National ISDN 1, AT&T 5ESS Custom, and NT DMS-100 Custom for the
United States, Canada
• Swissnet 3 for Switzerland
• NET3 for: Austria, Belgium, Denmark, France, Germany, Italy, Netherlands,
Norway, Spain, Sweden, Switzerland, United Kingdom
Bay Networks implementation does not allow you to send data across the D
channel.
PRI Service on the BLN and BCN
The Backbone Link Node (BLN®) and Backbone Concentrator Node (BCN™)
support the PRI standard for ISDN using a Single or Dual Port Multi Channel T1
Link Module or 120 ohm Single or Dual Port MCE1-II Link Module. The
integrated ISDN PRI functionality allows you to connect directly to the ISDN
network, rather than connect via a terminal adapter. PRI becomes a cost-effective
solution when the number of BRI channels required for an application exceeds the
cost of a single PRI line. The cost savings is depends on each country’s tariffs.
The PRI implementation supports all three dial services. Later chapters in this
book describe how to configure each service to connect to an ISDN network.
B Channel Support
In keeping with the PRI standard, each port on the MCT1 Link Module provides
23 B channels operating at 64 Kb/s for data transmission. Each port on the MCE1
Link Module provides 30 B channels also operating at 64 Kb/s for data
transmission.
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