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ETSI ETS 300 207-1
- Integrated Services Digital Network (ISDN); Diversion supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification
- standard by European Telecommunications Standards Institute, 12/01/1994
- Publisher: ETSI
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Layer 3 ISDN D-channel signalling procedures for control of the Call Forwarding Busy (CFB), Call Forwarding No Reply (CFNR), Call Forwarding Unconditional (CFU) and Call Deflection (CD) supplementary services