| 摘要 |
Apparatus is provided for enabling a standard telephone handset to be used in conjunction with a digital mobile radiotelephone system. DTMF dialled signals are encoded into digital form suitable for transmission over an RF channel and regenerated at the receiving end for routing to their intended destination. Switching means (5) operated by a DTMF decoder (4) interrupts the link between a speech coder (3) and radio transmitter (6) while a dialling signal is present. <IMAGE> |
