ÖNORM EN 301144-2 V 1.1.1:2001-01
Действует
Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 (SS7) protocols - Signalling application for the mobility management service on the alpha interface - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification
