| 摘要 |
PURPOSE: A method for connecting extension lines of a multichannel-type terminal in a WLL(Wireless Local Loop) system is provided to have an extension function by analyzing DTMF(Dual Tone Multi Frequency) into a software, by using a DSP(Digital Signalling Processor). CONSTITUTION: A method for connecting extension lines of a multichannel-type terminal in a WLL(Wireless Local Loop) system comprises the steps of: generating a transmitting tone for a corresponding hook, when a hook-off interrupt is generated; operating a first time switch by using a hook number from a CPU(Central Processing Unit), when first DTMF(Dual Tone Multi Frequency) is not #; checking phone state corresponding to a number of second DTMF, when a DSP section delivers information to the CPU by reading the second DTMF, when the first DTMF is #; hooking-on by generating a busy tone, when a phone corresponding to the number of the second DTMF is not a stand-by state; sending a ring signal to the phone corresponding to the number of the second DTMF, when the phone is a stand-by state; and a subscriber corresponding to the number of the second DTMF telephoning by hooking-off the phone. |
