Configuring Digital E&M Signaling 2331n ■ For the isdn protocol-type and isdn protocol-mode commands, refer to“ISDN Configuration” on page 421.■ The pri-set command is independent of the DSP resource (voice processingmodule-VPM). When no DSP resource is available, though IP calls cannot beplaced, local TDM calls can still be placed. Therefore, you can configure thiscommand even if no DSP resource is available.Configuring DigitalE&M SignalingConfiguring a StartModeSimilar to analog E&M signaling, digital E&M signaling also provides three startmodes: immediate-start, wink-start and delay-start. In whichever mode, the timesequence of digital E&M signaling is the same as that of analog E&M signaling.The only difference is that analog E&M signaling transmits signaling informationthrough the level change of Tip and Ring line but digital E&M signaling adoptsfour bits of TS16 to transmit signaling information as what R2 signaling does.Configuring the immediate start modeFollow these steps to configure the immediate start mode:n For the timer dial-interval, timer wait-digit, timer ring-back, delay, anddelay send-dtmf commands, refer to “VoIP Overview” on page 2243.Enter the view of the serialinterface created for the PRIsetinterface serial number: { 15| 23 }-Enable DSS1 or Q.SIGsignalingisdn protocol-type { dss1 |qsig }RequiredBy default, DSS1 signaling isenabled.Configure the signalingprotocol modeisdn protocol-mode{ network | user }RequiredBy default, the protocol modeis user.To do... Use the command... RemarksTo do... Use the command... RemarksEnter system view system-view -Enter E1/T1 interface view controller { e1 | t1 } number -Create a TS set for digitalE&M signaling and select theimmediate start modetimeslot-set ts-set-numbertimeslot-list timeslots-listsignal e&m-immediateRequiredExit E1/T1 interface view quit -Enter voice view voice-setup -Enter digital E&M voicesubscriber line viewsubscriber-lineslot-numbe:ts-set-number-Configure the delay that thecalling party must experiencebefore sending DTMF digits inimmediate start modedelay send-dtmfmillisecondsOptional300 milliseconds by default.
