Isdn Bri Terminals - Nortel Meridian 1 Administration And Maintenance

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ISDN BRI terminals

553-3011-311 Standard 7.0
Chapter 5 — ISDN BRI line and packet data implementation
ISDN BRI terminals deemed compatible with the Option 11 system should
comply with ANSI, ETSI NET-3, INS NET-64 or Numeris standards for
ISDN BRI terminals. 1TR6 terminals are also supported through a 1TR6 to
ETSI NET-3 converter box. The list of terminals deemed compatible may
change without notice. To obtain the latest list of compatible terminals,
contact your Northern Telecom representative.
1TR6 terminal connectivity
1TR6 is the ISDN protocol used in Germany and in any country that supports
German protocol.
A Terminal Adapter (the S
interface with Option 11 ISDN BRI and 1TR6 terminals. Its main function is
to convert 1TR6 protocol, sent from the 1TR6 ISDN Terminal Equipment,
into the European Telecommunication Standard Institute (ETSI) protocol
required for ISDN BRI, and vice versa. This conversion is necessary because
the layer 3 requirements for 1TR6 and ETSI are different. Figure 20 shows a
1TR6 ISDN BRI terminal connected to a 1TR6 terminal adapter (the
S 0 -adapter), which is used to access the Option 11.
Figure 20
ISDN BRI/1TR6 terminal connectivity
S O -Adapter
1TR6
ISDN BRI
Terminal Equipment
May 1999
-Adapter) has been specifically designed to
0
ISDN BRI
S/T Interface
Option 11
553-7575.EPS