1118 The TDS/DTR cardTone detectorThe TDS/DTR card provides eight channels of DTMF (Dual ToneMulti-Frequency) detection in A-Law or μ-Law.In North America, pre-programmed data is configured for μ-Law tonedetection.SDI functionThe TDS/DTR card provides two SDI (Serial Data Interface) ports.Refer to "SDI ports" in Communication Server 1000M and Meridian 1 LargeSystem Planning and Engineering (NN43021-220) for more information.Tones and cadencesThe following tables give the tones and cadences provided by the NTAK03TDS/DTR card.Table 457NTAK03, NTDK20, and NTDK97 Mu-Law tones and cadenceTone #Frequency(Hz)dB belowoverloadPrecisionRingingTonesDTMFDigits MF Digits1 350/440 -23/-23 ÷2* (533 + 666) x 10 -23/-23 ÷3 440 -23 ÷4 350/440 -19/-19 ÷5 440/480 -25/-25 ÷6 480 -23 ÷7 480/620 -30/-30 ÷8 1020 -16 ÷9 600 -23 ÷10 600 -16 ÷11 440/480 -22/-22 ÷12 350/480 -23/-23 ÷13 440/620 -24/-24 ÷14 940/1630 -12/-10 P15 700/1210 -12/-10 116 700/1340 -12/-10 217 700/1480 -12/-10 318 770/1210 -12/-10 4Nortel Communication Server 1000Circuit Card ReferenceNN43001-311 01.04 StandardRelease 5.0 23 May 2008Copyright © 2003-2008, Nortel Networks.
