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Service Testing Provisioning • Support for QoS measurements necessary to verify dependability, accuracy, and speed of service for both PVC and SVC links • Selectable header data includes virtual path identifier (VPI), virtual channel identifier (VCI), and cell loss priority (CLP) field manipulation, service data unit (SDU), and congestion (CNGST) • Selectable test cells consistent with ITU O.191 and compatible with TTC’s FIREBERD 6000 test set • Configurable for generation of continuous bit rate (CBR),unspecified bit rate (UBR), and variable bit rate (VBRrt and VBRnrt) cell streams at full line speeds • User-selectable cell stream parameters, including peak cell rate (PCR), sustained cell rate (SCR), maximum burst size (MBS), and cell delay variation tolerance (CDVT) • Support for up to eight (SVC) or 12 (PVC) simultaneous user-defined cell streams Troubleshooting • Auto-detection of all active VPI/VCI combinations, with extensive statistics on each pair, including cell throughput, PCR, and CLP cell count • Additional statistics for lost cells, misinserted cells, congested cells, and cell errors available in termination mode • General reporting of correctable (single) and uncorrectable (multiple) header error control (HEC) errors, verifying the switches’ ability to detect and correct single errors • Operations, administration, and maintenance (OAM) support and analysis for loopback, continuity check, alarm indication signal (AIS) and far-end receive failure (FERF), and performance management cells • Optional full-duplex monitoring capability for ATM-25, E1/DS1, E3/DS3, and STM-1/OC-3c interfaces • Remote control supports long term maintenance/manufacturing functions using ViTL software Physical Layer Testing • Signal loss, frame loss, yellow alarm, and AIS displayed via easy-to-see LEDs • Thorough Layer 1 statistics including frame, far-end block errors (FEBE), and BIP errors • Bit error rate testing (BERT) with pseudo-random and fixed patterns appropriate to each specific interface