H3C VG8020与北电6440对接案例

            VG8020与北电6440对接案例

一、       组网：

省委     北电8606

               |

市委     北电6440―数字中继―VG8020－IP网－VG

               |                        |

               |            市政府    XE2000－VG

               |

县委     北电4460

原有北电设备（8606/6440/4460）都是类似ATM/FR交换机，可以通过语音板卡实现语音业务，原有语音系统基于VoFR的。6440只支持数字中继，4460支持FXS。

我们使用VG8020的E1VI接口走数字中继与6440进行对接

二、       VG8020使用R2信令与北电6440进行对接：

1．           VG8020关键配置：

  controller e1 0                                                              

    timeslot-set 0 timeslot-list 1-15,17-31 signal r2                           

    cas 0                                                                      

    mode itu-t custom 

  （该版本6440不支持中国一号，我们需要配置成R2模式）                                                        

    ani             

  （请求主叫号码）                                                         

    dtmf enable      

（该版本6440不支持MFC方式，需要配置成DTMF方式）                                                        

    quit

注：

1）  MFC（多频互控）和DTMF（双音多频）是两种传输号码的方式。VG8020支持这两种方式，当使用R2协议时，缺省情况下采用MFC的方式进行传输号码。

2）  使用R2协议，如果使用DTMF方式传输号码，由于协议限制无法接收主叫号码，即被叫侧没有来电显示。

3）  R2协议的协议交互流程繁琐，因此采用R2协议建立的呼叫接续非常慢。

2．           VG8020使用R2协议，调试信息解读

拓扑：

电话6121---北电4460---IP---北电6440---数字中继---VG8020---IP---VG2016---电话3120

操作方法：

采用电话（3120）呼叫电话（6121），在VG8020上打开如下调试信息：

debug voice ipp all

debug voice dpl all

debug voice r2 all

VG8020输出的调试信息如下：

[vg8020]                                                                        

  IPP_225 [ -1]: receive Setup msg, crv=32777, src=1.1.1.2       /收到一个来自IP侧的呼叫              

                 called=96121, caller=3120,FacilityLen=0                       

  IPP_225 [ -1]: Setup msg, faststart=TRUE, tunnel=FALSE, h245=NONE            

  IPP_225 [ -1]: Send CallProceeding Msg when receive Setup Msg                

  IPP_VCC [ -1]: Send IPCallOut Msg when receive Setup Msg                     

  DPL_SRCH: [GetEntity]The matched entity list:                                 

             11                                                                

  DPL_INTF: Get entity 11 successfully!                    /匹配了实体“11”                    

R2:MSG -> Receive RCV Msg [RCV_R2_OFFHOOK_MSG]:                                

          PrimId   = [3],                                                      

          Channel  = [1],                                                       

          CallId   = [1374],                                                   

          S-type   = [0],                                                      

          Callednumber = [6121],                                               

          Callernumber = [3120]!                                               

R2:TSM -> Set timeslot [0:1] state [TK_ACTIVE]!                                

R2:CTL -> Receive RCV message [RCV_R2_OFFHOOK_MSG]!                            

R2:CTL -> Enter state [CTL_WAIT]!                                              

R2:CTL -> Start state timer [CTL_WAIT_TIMER], timelen is [120000]!             

R2:LINE-> Receive event [CTL_DL_TKO_SEIZURE] in state [DL_REST]!               

R2:LINE-> Enter state [DL_TAKE]!                                               

R2:LINE-> Start state timer [DL_TAKE_TIMER], timelen is [1000]!                

R2:LINE-> Send DL signal [0001]!     

/VG8020向6440发送线路占用信令0001（R2信令cd两位是01；如使用中国一号cd两位是11）                        

R2:MSG -> Send DL Msg: Channel = [1], SigVal = [0001]!                         

R2:MSG -> Receive DL Msg: Channel = [1], SigVal = [1101]!  

/ VG8020收到6440的占用确认信令1101                   

R2:LINE-> Receive DL signal [1101] in state [DL_TAKE]!                         

R2:LINE-> Enter state [DL_TAKEACK]!                                            

R2:LINE-> Start state timer [DL_TAKEACK_TIMER], timelen is [60000]!            

R2:CTL -> Receive DL event [DL_CTL_TKO_SEIZURE_ACK]!                           

R2:DTMF-> Enter state [DTMF_WAIT]!                                             

R2:DTMF-> Start [DTMF_WAIT_TIMER], Timelen is [10000]!                         

R2:DTMF-> Send DTMF number [6121], number length [4]!       

 / VG8020以DTMF方式发送被叫号码6121                     

R2:MSG -> Send DTMF Msg: Channel = [1], Number = [6121], Length = [4]!         

R2:MSG -> Receive DTMF Msg: Channel = [1], SigVal = [0], Cmd = [85]!           

R2:DTMF-> Send all DTMF number completely!       

/ 被叫发送完全                             

R2:DTMF-> Enter state [DTMF_IDLE]!                                             

R2:CTL -> Receive DTMF event [DTMF_CTL_TKO_END]!                               

R2:CTL -> Send message [R2_RCV_ALERT_MSG] to RCV!                              

R2:MSG -> Send to RCV message [R2_RCV_ALERT_MSG]:                              

          PrimId   = [3],                                                      

          Channel  = [1],                                                      

          CallId   = [1374],                                                   

          S-type   = [0],                                                      

          Param[0] = [1],                                                       

          Param[1] = [31],                                                     

          Callednumber = [],                                                   

          Callernumber = []!                                                    

  IPP_VCC [  1]: Receive CCAlerting Msg,FacilityLen=0                          

  IPP_225 [  1]: Send Alerting Msg when receive CCAlerting Msg                 

  IPP_225 [  1]: Alerting Msg with FastStart, Codec=G729                        

  IPP_SOK [  1]: Send RTP/RTCP Sock Req when send Alerting Msg                 

  IPP_SOK [  1]: Rcv DATA SockAck, ids=331:332, RTP=16416@1.1.1.1, RTCP=16417@1.

1.1.1                                                                           

  IPP_VPP [  1]: Send Codec Msg when create RTP/RTCP socket OK: CodecType = G729

  IPP_VPP [  1]: send voice packet 100 Len = 30  

/由于是一个快启呼叫，此时发送的RTP语音包实际是回铃音                           

  IPP_VPP [  1]: send voice packet 200 Len = 30                                

  IPP_VPP [  1]: send voice packet 300 Len = 30                                

  IPP_VPP [  1]: send voice packet 400 Len = 30                                

  IPP_VPP [  1]: send voice packet 500 Len = 30                                

  IPP_VPP [  1]: send voice packet 600 Len = 30                                

  IPP_VPP [  1]: send voice packet 700 Len = 30                                 

R2:MSG -> Receive DL Msg: Channel = [1], SigVal = [0101]!  

/VG8020收到6440的应答信令0101                   

R2:LINE-> Receive DL signal [0101] in state [DL_TAKEACK]!                      

R2:LINE-> Enter state [DL_ANSWER]!                                             

R2:CTL -> Receive DL event [DL_CTL_TKO_ANSWER]!                                 

R2:CTL -> Send message [R2_RCV_ACTIVE_MSG] to RCV!                             

R2:MSG -> Send to RCV message [R2_RCV_ACTIVE_MSG]:                             

          PrimId   = [1],                                                       

          Channel  = [1],                                                      

          CallId   = [1374],                                                   

          S-type   = [0],                                                       

          Param[0] = [2],                                                      

          Param[1] = [0],                                                      

          Callednumber = [6121],                                               

          Callernumber = [3120]!                                               

R2:MSG -> Receive RCV Msg [RCV_R2_ACTIVE_ACK_MSG]:                             

          PrimId   = [1],                                                      

          Channel  = [1],                                                      

          CallId   = [1374],                                                   

          S-type   = [0],                                                      

          Callednumber = [],                                                    

          Callernumber = []!                                                   

R2:CTL -> Receive RCV message [RCV_R2_ACTIVE_ACK_MSG]!                         

R2:CTL -> Enter state [CTL_ACTIVE]!                                             

  IPP_VCC [  1]: Receive CCConnect Msg,FacilityLen=0                           

  IPP_225 [  1]: Send Connect Msg when receive CCConnect Msg                   

  IPP_VPP [  1]: send voice packet 800 Len = 30       

/进入语音通话交互过程                        

  IPP_VPP [  1]: receive voice packet 100 Len = 30                              

三、       VG8020使用PRI信令与6440进行对接：

1．VG8020关键配置

  controller e1 0                                                              

    pri-set timeslot-list 1-31

  interface Serial0:15                                                         

    isdn service speech                                                       

    isdn service audio        

/在与PBX进行E1VI对接时，最好把语音/音频两种业务类型都配置上                                                  

    isdn ignore hlc         

/SETUP消息中不携带高层兼容性信息单元                                                      

    isdn ignore llc         

/SETUP消息中不携带低层兼容性信息单元，

(当PBX不识别高/低层兼容性时，需要配置以上两个命令，表示setup消息中忽略高/低层兼容性)