A

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