Nortel Meridian Meridian 1 Feature Description And Administration page 892

Page 892 of 1814
553-2901-301 Standard 9.00 January 2002
ISDN PRI Central Office Connectivity
In addition to providing all of the functionalities provided by the original
introduction of EuroISDN and the EuroISDN Continuation, EuroISDN
Continuation Phase III introduces the following new functionalities for all
EuroISDN interfaces:
• optional sending of last forwarding DN as CLID
• Trunk Route Optimization - before Answer applied to incoming
EuroISDN trunks
• Numbering Plan Identification (NPI) and Type of Number (TON)
included in CDR tickets for EuroISDN calls
The EuroISDN ETS 300 403 Compliance Update feature has been
introduced to provide ISDN Primary Rate Interface and Basic Rate Interface
to Central Offices that comply with the ETS 300 403-1 European Telecom
Standards Institute (ETSI) standard.
Note: In order to support countries that have not yet upgraded to the ETS
300 403 standard, the Meridian 1 still interworks with Central Offices
conforming to the ETS 300 102 standard. So, when programming the
D-Channel for PRI2 trunks (in LD 17) or a PRI2 route for ISDN trunks
(in LD 16) for an ETS 300 403 interface, the following applies:
• If IFC = E403 and CNTY = ETSI (ETS 300 403 for the user side) or NET
(ETS 300 403 for the network side), then the interface is fully compliant
with ETS 300 403.
• If IFC = E403 and CNTY = any of the supported country entries except
ETSI and NET, then the interface behaves like an ETS 300 102 extended
version, that is, in addition to the existing ETS 300 102 capabilities, the
bearer capability and High Layer Compatibility selection procedures
(fall-back mechanism), and the basic telecommunication service
identification are also implemented in order to take advantage of new
teleservices being offered, such as 7kHz telephony and Videotelephony.
Also note that a user may still configure an interface fully compliant with
the ETS 300 102 standard if IFC = EURO and CNTY = any of the
supported country values.