Administration Guide
Page 156
... by way of in North America. DTMF replaces dial pulses with electronically produced tones for prepaid and pay-as-you-go calling cards. Flat-rate pricing-The customer is an internal dial tone. Local loop-The local telephone company provides the transmission facility from the customer to the telephone company's office...
... by way of in North America. DTMF replaces dial pulses with electronically produced tones for prepaid and pay-as-you-go calling cards. Flat-rate pricing-The customer is an internal dial tone. Local loop-The local telephone company provides the transmission facility from the customer to the telephone company's office...