Cisco WS C4224V 8FXS Software Guide - Page 51
No Ring Back Tone Generated
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Chapter 1 Product Overview Recommended Configurations Step 4 Step 5 Busy-out the time slots for which DSP resources could not be allocated. The following sample configuration shows how to busy-out the time slots: isdn service dsl 0 b_channel 17-24 state 2 Use the show isdn service command to ensure that the channel is out-of-service. The following sample configuration shows channels in service: C4224# sh isdn ser PRI Channel Statistics: ISDN Se1/0:23, Channel [1-24] Configured Isdn Interface (dsl) 0 Channel State (0=Idle 1=Proposed 2=Busy 3=Reserved 4=Restart 5=Maint_Pend) Channel : 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 State : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 Service State (0=Inservice 1=Maint 2=Outofservice) Channel : 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 State : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 2 2 2 2 2 2 For incoming calls, only time slots 1-16 are used by the switch or PBX. North American CO ISDN switches should support SERVICE/SERVCE ACK messages for maintenance service of B-channels on the PRI span. For the CO switches that do not support this service, you must ask the provider to busy-out the channels. No Ring Back Tone Generated When receiving or placing a call from an ISDN terminal (T1/E1 PRI), there is no Progress IE in the setup. (Progress IE = 0.) The Catalyst 4224 does not generate ringback when it receives an alert from Cisco CallManager. You can avoid this situation and force the Catalyst 4224 to generate a ringback using the progress indicator commands on the VoIP and POTS dial-peer statements. The following sample configuration shows how to generate a ringback. dial-peer voice 500 voip destination-pattern 5... progress_ind setup enable 3 session target ipv4:10.200.73.15 codec g711ulaw dial-peer voice 300 pots destination-pattern 1... OL-2031-02 Catalyst 4224 Access Gateway Switch Software Configuration Guide 1-25