Rec. ITU-T G.180 (11/1988) � CHARACTERISTICS OF N + M TYPE DIRECT TRANSMISSION RESTORATION SYSTEMS FOR USE ON DIGITAL SECTION
1 General
2 Object of Recommendation
3 RSE specifications
    3.1 Interfaces
    3.2 Operational aspects
4 RSCE specifications
    4.1 Interfaces
    4.2 Operational aspects
SUPPLEMENT A (to Table 2/G.180) � Maximum permissible intrinsic jitter at output ports of regenerative restoration switching equipment
SUPPLEMENT B (to Table 2/G.180) � Jitter transfer characteristics recommended for regenerative restoration switching equipment
APPENDIX I � Proposals for alarms and status criteria (Both refer to a N + 1 system)
APPENDIX II � Proposals for monitoring and self-test procedures (Both refer to a N + 1 system)