的Cisco IOS拨号对等：网络电话拨号点

在最后的博客，入站POTS拨号对等体是为全球知识创造。当购买的电路，我们要求只有最后5位数字的直接向内拨号（DID）号码的块。对于我们的示例起见，我们将假设全球知识购买以下DID块从PSTN提供商：•（212）551-1000通过（212）551-1999由于我们将只从载波接收最后5位数字，我们将收到的来自供应商的数字范围如下：•11000 - 11999收到的数字（被叫方号码），可以用“调试ISDN Q931”思科路由器上的命令来验证。假定有一个telnet或SSH会话路由器，请记住从一个特权的Cisco IOS提示打开终端显示器上如下所示：路由器＃终端显示器的终端显示器命令不能从配置模式执行（除非做命令快捷用来）。终端监视命令重定向控制台输出到虚拟终端会话（虚终端端口）的Cisco路由器。调试ISDN Q931是验证主叫方和供应商在Q.931建立消息发送被叫用户号码信息的好方法。ISDN Q931命令调试是无用的具有模拟FXO或模拟中继线（DID）端口。在分析了模拟电路的呼叫时，“调试声音CCAPI INOUT”命令是有用得多。 T1 CAS circuits are by far the hardest circuits to troubleshoot. It is recommended to use both the “debug vpm all” and the “debug vpm signal” commands when troubleshooting issues on channel associated signaling (CAS) voice interfaces. The inbound dial-peer for calls from the PSTN is the POTS dial-peer 1 that was created in the last blog. Two outbound VoIP dial-peers will be created to route the outbound call leg. Analyze inbound and outbound dial peers from the router’s perspective. If I was a router… and I was receiving a call from a PRI… and then forwarding the call to Call Manager (CUCM), what dial-peer elements would I need to achieve this? The following dial-peer examples are the two VoIP dial-peers used to route the last 5 digits to two different Cisco Unified Communications Manger servers performing call processing: Dial-peer voice 100 voip Destination-pattern 11… Ip qos dscp cs3 signaling Dtmf-relay h245-alphanumeric No vad Codec g711ulaw Preference 1 Session target ipv4:10.1.1.1 Dial-peer voice 101 voip Destination-pattern 11… Ip qos dscp cs3 signaling Dtmf-relay h245-alphanumeric No vad Codec g711ulaw Preference 2 Session target ipv4: 10.1.1.2 In the next blog, we will discuss all of the commands provisioned in the previous dial-peers. There are many other optional commands to include in the configuration of H.323 gateways and H.323 dial peers. REFERENCES Global Knowledge Cisco Unified Communications classes www.globalknowledge.com/go/cisco Cisco Press Books – CVOICE / GWGK / TUC www.ciscopress.com Dial Peer Configuration on Voice Gateway Routers (12.4T) http://www.cisco.com/en/US/docs/ios/voice/dialpeer/configuration/guide/12_4t/vd_12_4t_book.html Cisco IOS H.323 Configuration Guide (12.4T) http://www.cisco.com/en/US/docs/ios/voice/h323/configuration/guide/12_4t/vh_12_4t_book.html