© 2006 Cisco Systems, Inc. All rights reserved.Presentation_ID 1 CME 4.2 Feature: Push-To-Talk (PTT) Nick Matthews Customer Support Engineer

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 2 Agenda  PTT  Configuration  Debugs  Q and A  Issues

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 3 Push To Talk  Can be used for quick communication between workers that commonly call each other  Also useful for broadcasting to external speakers  User is immediately sent to audio without ringing delay Allows for 7921 user to have Walkie-Talkie behavior

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 4 Requirements  Phone load must be or later  Supported after CME 4.2 .cnf file for phone must include service phone thumbButton1 PTTH6 This setting can be set globally under telephony-service, and is case-sensitive PTTHX is the parameter, where X is the button number configured (up to 6 on 7921s)

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 5 PTT Call Flow ephone 1 type 7921 button 1:1 6:10 ephone-dn 10 intercom 1050 ephone-dn 50 number 1050 paging 2) Held to offhook on button 6 (dn 10) 1) Thumb button 3) Intercom line automatically dials 1050, a paging number 4) All phones configured with ‘paging-dn 50’ receive one-way voice path from ephone 1 5) ephone 1 hears “zipzip” tone and begins talking Diagram From 4.3 NPI

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 6 Configuration ephone 14 type 7921 button 1:1 6:24 ! ephone-dn 24 number 270 intercom 1080 ! ephone-dn 31 number 1080 paging ! ephone 5 type 7961 button 1:2 paging-dn 31 telephony-service service phone thumbButton1 PTTH6 !

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 7 Debugs : Jun 30 23:54:58.780: ephone-14[8]:StimulusMessage 9 (6) From ephone : Jun 30 23:54:58.780: ephone-14[8][SEP001F6C7A37C6]:LineButtonPress : Jun 30 23:54:58.780: ephone-14[8]:SpeakerPhoneOffHook : Jun 30 23:54:58.780: SkinnyGetCallState for DN 24 chan 1 SIEZE : Jun 30 23:54:58.792: ephone-14[8][SEP001F6C7A37C6]:AutoDial to : Jun 30 23:54:58.808: ephone-14[8]:SkinnyUpdateCState activeLine 6 chan 1 DN 24 ref : Jun 30 23:54:58.808: SkinnyGetCallState for DN 24 chan 1 ALERTING : Jun 30 23:54:59.832: ephone-14[8]:Send StopTone for parche/seaview phones before OpenReceive : Jun 30 23:54:59.836: SkinnyGetCallState for DN 24 chan 1 CONNECTED : Jun 30 23:55:00.624: Skinny StartTone 49 sent on ephone socket [8] DtZipZip : Jun 30 23:55:00.824: ephone-14[8]:SkinnyTryCall to 1080 instance 1 start at 0 secondary : Jun 30 23:55:01.888: ephone-14[8][SEP001F6C7A37C6]:ONHOOK (from phone msgID=7)

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 8 Show Commands nicmatth-sip#show call active voice brief 126D : ms pid:20023 Answer 270 active dur 00:00:41 tx:1980/63360 rx:2021/40420 Tele 50/0/24 (53) [50/0/24.0] tx:39600/39600/0ms g711ulaw noise:0 acom:0 i/0:0/0 dBm 126D : ms pid:20030 Originate 1080 active dur 00:00:41 tx:0/0 rx:0/0 Tele 50/0/31 (54) [50/0/31.0] tx:0/0/0ms g711ulaw noise:0 acom:0 i/0:0/0 dBm nicmatth-sip(config)#do sh voice call summ PORT CODEC VAD VTSP STATE VPM STATE ============== ========= === ==================== ====================== 50/0/ EFXS_ONHOOK 50/0/24.1 g711ulaw n S_CONNECT EFXS_CONNECT 50/0/31.1 g711ulaw n S_CONNECT EFXS_CONNECT

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 9 Troubleshooting  Check DN configuration – intercom configuration and that the receiving phone has paging-dn # configured  The service phone thumbButton1 PTTH6 is configured, and the capitalization is correct –Also check the ephone-dn for the type command –Create cnf

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 10 Q and A

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 11