Digital Subscriber System No. 2

Digital Subscriber Signalling System No. 2 (DSS2), as the successor to DSS1,¹ is also a digital signalling protocol (D channel protocol) used for the B-ISDN.

References

Integrated Services Digital Network (ISDN); User-network interface layer 3 Specifications for basic call control

[ETS_300_102-1] Integrated Services Digital Network (ISDN); User-network interface layer 3 Specifications for basic call control

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