Differences Between TDM and FDM(abut TDM and FDM)

Time-division multiplexing (TDM)
                                                       is considered to be a digital procedure which can
be employed when the transmission medium data rate quantity is higher than the data
 rate requisite of the transmitting and receiving devices. 

Frequency-division multiplexing (FDM) 
                                                               is an analog technique which is implemented only when the bandwidth of the link is higher than the merged bandwidth of the signals to be transmitted. 
Each sending device produces signals which modulate at distinct carrier frequencies.
 To hold the modulated signal, the carrier frequencies are isolated by adequate bandwidth

Time Division Multiplexing (TDM)	Frequency-Division Multiplexing (FDM)
The time-division multiplexing (TDM) includes sharing of the time through utilizing time slots for the signals.	frequency-division multiplexing (FDM) involves the distribution of the frequencies, where the channel is divided into various bandwidth ranges (channels).
Analog signal or Digital signal any could be utilized for the TDM	FDM works with Analog signals only.
Framing bits (Sync Pulses) are used in TDM at the start of a frame in order to enable synchronization	FDM uses Guard bands to separate the signals and prevent its overlapping
The utilization of physical link in case of TDM is more efficient than in FDM.	FDM system divides the link in multiple channels which does not make use of full channel capacity