000			00685nam a2200265Ia 4500
001			15742
005			20250221150814.0
008			250214s9999||||xx |||||||||||||| ||und||
020			_a812650157X
100			_aHorak, Ray
245		0	_acommunication systems and networks
250			_a2
260			_aMumbai
260			_bIDG Books
260			_c2000
300			_axxxii, 697p. : ill.
500			_aIncludes index.
650			_aCommunication networks
650			_aComputer networks
650			_aData communications
650			_aPublic switched telephone network -- PSTN
650			_aVoice communications systems
650			_aWireless networking
942			_cBK
999			_c31770 _d31770