Using Loopbacks 178T1/E1 UNI with IMA Loopbacks 179OC3/STM-1 Loopbacks 180DS3 Loopbacks 181E3 Loopbacks 181CBR Loopbacks 182Setting VCM Loopbacks 182Setting VCM Port Loopbacks 183Setting VCM Channel Loopbacks 184Setting Tone Injection 185Viewing Performance and ATM Statistics 185Viewing Card Statistics 186Viewing MCPU Card Statistics 187Viewing T1/E1 UNI with IMA Card Statistics 187T1/E1 Port/Link Statistics 188T1/E1 Group Statistics 189Viewing OC3/STM-1 Card Statistics 190Viewing OC3/STM-1 Performance Statistics 190Viewing OC3/STM-1 ATM Statistics 193Viewing DS3 Card Statistics 193Viewing DS3 UNI Performance Statistics 193Viewing DS3 UNI ATM Statistics 194Viewing E3 Card Statistics 194Viewing E3 UNI Performance Statistics 194Viewing E3 UNI ATM Statistics 195Viewing SIM Card Statistics 195SIM HDLC Statistics 195SIM Frame Relay Statistics (per DLCI) 196SIM DXI Statistics 196SIM ATM VC Statistics (per VCI) 196SIM LMI Statistics 197Viewing Ethernet Card Statistics 197Ethernet Statistics 198Spanning Tree Statistics 200IP over ATM Statistics 200Ethernet ATM VC STatistics 201Viewing CBR Module Card Statistics 201CBR Performance Monitoring Statistics 202CBR ATM Statistics 202Viewing Voice Compression Module Statistics 203Voice Compression Module Performance Monitoring Statistics 204Voice Compression Module VC Statistics 205Voice Compression Module Port Activity Statistics 206Viewing Virtual Circuit Statistics 206Viewing Virtual Circuit Statistics by Circuit 206Viewing Virtual Circuit Statistics by Port/Group 208Viewing Virtual Circuit Statistics by Shaper 208Viewing Virtual Circuit Statistics by Buffer (Queue) 209