account codes, PBX systems and, 30–31
account numbers, on technical cut sheet, 161
alarms, indicating circuit failure, 266
Alaska, troubleshooting toll-free calls from, 253–256
“all circuits are busy” message, 223
all-data mismatch, migration request rejection and, 173
AMI/SF (Alternative Mark Inversion/Super Frame), 137
Analog Telephone Adapter (ATA), VoIP service and, 318
ANI (Automatic Number Identification)
pseudo, 66
understanding, 49, 328
ANI delivery
ordering, 181
tracking toll-free calls and, 81
ANI infodigits (ANI II)
ordering toll-free service and, 181–182
pay phone surcharges and, 75
understanding/using, 76–77
answering machines, with no phone system, 26–27
appeals process, billing disputes and, 109
area code, LERG database and, 47
ATA (Analog Telephone Adapter), VoIP service and, 318
Automatic Number Identification (ANI)
pseudo, 66
understanding, 49, 328