Nortel Networks 9150 - Manual (Page 256)

226 Remote Gateway 9150 Installation and Administration Guide
Configuring the Remote Gateway 9150 unit Standard 3.1
Remote Gateway 9150 ISDN BRI Interface information—
for Norway and Sweden only
EN 60950:1992 Annex ZB, Special National conditions, Clause 6.2.1.2 states
that in Norway and Sweden, supplementary insulation for a primary circuit is
required between a Telecommunications Network Voltage (TNV) circuit and
any circuit that has a connection to a protective earthing terminal.
The Remote Gateway 9150 unit has the ability to support up to four ISDN BRI
circuits. To comply with the specification for supplemental insulation, an
isolation adapter must be placed between each of the Remote Gateway 9150 unit
BRI inputs and the BRI lines from the service provider.
Isolation adapters are available from local vendors. You can also order the
adapters from Nortel as a merchandise item. The Nortel part number is
P0935714.
ISDN Line Type
The line type you select determines the options available in the Switch Type list
box and the Automatic default coding law (Companding Algorithm) used by the
ISDN BRI module being configured. To select a different coding law setting,
click on the Coding Law on the 9150 System Configuration property sheet.
Refer to “Companding Algorithm” on page 181 for further details.
Choose the ISDN line type according to the following table:
Line Type Default Coding Law
Proprietary Switch µ-law
National ISDN – 1 µ-law
National ISDN – 2 µ-law
National ISDN – 3 µ-law
National ISDN – 4 µ-law
Japan NTT µ-law
France A-law
Germany A-law
ETSI EuroISDN A-law