ETSI EN 300 138-2
- Integrated Services Digital Network (ISDN); Closed User Group (CUG) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification
- standard by European Telecommunications Standards Institute, 06/01/1998
- Publisher: ETSI
$13.00$25.50
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