000 00264nam a22001217a 4500
999 _c6477
_d6477
003 OSt
005 20210321102931.0
008 210321b ||||| |||| 00| 0 eng d
100 _aBALLANY, JOHN C.
245 _aDIGITAL TELEPHONY
260 _bWILEY
942 _2ddc
_cGE