Voice Lab 7- AAR-SRST-Media Resource

简介:

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一 集中式部署模型中的两个solution: 1-AAR,2-SRST

分布式模型没有这两个技术

1-AAR

AAR 首先是发生在IP链路拥塞的情况下的,而SRST则是发生在IP链路中断的情况下

Regional : 放在不同的device pool,使用不同的编码

Location :配置带宽,让CM知道当前链路状态

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Location的试验:

1-新建立一个’remote’ location

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我用1000--->2000 建立call,再用1001 ------->2001则不通,提示错误

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2-reginal试验

由于是两个不同的site所以我们建议1000 2000在通话时使用729的编码,减少带宽使用

由于不同region 是要挂不同的device pool的,所以新建一个device pool 外带一个新建立的region.

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这样,两边通话就是729编码

由于AAR是IP拥塞才出现,且要配合MGCP,试验暂时不做

2-SRST

SRST 是在IP 中断或者找不到CM时候触发的,多半和MGCP回滚同时使用

1-在device pool下调用srst

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2-在R2上做MGCP回滚

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如果我把link断掉则2000的电话显示如下:测试成功

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SRST 还有个srst in cme这个模式,这个需要ios version 7支持.

二 媒体资源

总结

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1-SW 软资源会议

一种是 ad hoc会议模式,就是两方通话把第三方拉进来

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另外一种 是通过meet me, 需要消耗一个DN ,就是会议主持者建立一个meet me的虚拟会议室

先要建立一个meet me number ,比如说1007

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主持者点meet me,输入1007,其它参加者就直接拨打1007即可

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2-HW CFB的配置过程

2-1 创建DSP farm

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2-2 创建dsp profile

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2-3 sccp通知 call manager

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绑接口

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创建SCCP GROUP

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2-4 在CM 上 创建CFB 和 media resource group/list ,最后放进device pool

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最后敲入sccp通知CM

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Show sccp connection 可以看到哪些end在连

Show voip rtp connection

资源使用就近原则

在CME下也可以使用硬资源

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以上为实际的操作关系


本文转自 bilinyee博客,原文链接:  http://blog.51cto.com/ericfu/1827738      如需转载请自行联系原作者


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