Digital subscriber line (DSL) systems comprised of access multiplexers, plug-in cards and multiplexers for digital loop carriers, and customer premise equipment (CPE) equipment, namely, DSL modems and telecommunications access apparatus and devices, namely, multiplexers utilizing TI and DSL technology and network interface units for performance monitoring and feedback of special circuits

'access':8,31 'apparatus':32 'card':13 'carrier':19 'circuit':53 'compris':6 'cpe':24 'custom':21 'devic':34 'digit':1,17 'dsl':4,27,40 'equip':23,25 'feedback':50 'interfac':44 'line':3 'loop':18 'modem':28 'monitor':48 'multiplex':9,15,36 'name':26,35 'network':43 'perform':47 'plug':11 'plug-in':10 'premis':22 'special':52 'subscrib':2 'system':5 'technolog':41 'telecommun':30 'ti':38 'unit':45 'util':37

audio teleconferencing, multi-point video conferencing broadcast fax, and multimedia teleconference services

'audio':1 'broadcast':8 'conferenc':7 'fax':9 'multi':4 'multi-point':3 'multimedia':11 'point':5 'servic':13 'teleconfer':12 'teleconferenc':2 'video':6

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