IMS CSCF entities

呼叫会话控制功能(CSCF)是IMS的核心功能实体，主要功能是实现IMS域的呼叫和会话控制。IMS中定义了三种CSCF：
(1)代理CSCF(P-CSCF)：位于访问网络中，是SIP用户接入IMS的入口点。主要负责受理SIP用户接入，SIP消息的转发、完整性保护和压 缩处理。P-CSCF中的PDF(策略判决功能)模块负责对多媒体业务的QoS要求进行策略判决。P-CSCF也可用来提供紧急业务的本地控制。
(2)查询CSCF(I-CSCF)：位于归属网络中，是SIP消息进入归属IMS网络的入口点。主要负责查询HSS来为用户选择S-CSCF，并将SIP消息发到该S-CSCF；
作为外部网络到IMS归属网络的网关，支持防火墙功能，并 具有隐藏归属网络拓扑的功能，从而允许各运营商IMS网络保持配置独立安全。
(3)服务CSCF(S-CSCF)：位于归属网络中，根据需要可设置多个。主要功能是接受用户注册，从归属地用户服务器(HSS)下载并临时存储用户相关数据；重定向路由，进行呼叫会话控制；触发用户签约业务，协同业务平台进行业务支持等。
Posted by JiangBo at 11:01:58 | Permanent Link | Comments (0) |

Because the mobile pthone can not support Chinese ,if we paser the file with Chinese the system will promte that UnicodeEncodeError: 'ascii' codec can't encode characters in position 6-8: ordinal not in range(128)

Posted by JiangBo at 18:18:41 | Permanent Link | Comments (0) |

I have found the way to parse the XML files which come from Web page

Posted by JiangBo at 17:56:29 | Permanent Link | Comments (0) |

Apache httpd must be set root user and root group power, in order to invoke our applications.Setting must be done when doing crossing-compile httpd.

Posted by JiangBo at 16:20:45 | Permanent Link | Comments (0) |

Data transmission by XML have found a way

Posted by JiangBo at 16:12:30 | Permanent Link | Comments (0) |

Dirctly operate database by PySqlite has no problem.

Posted by JiangBo at 16:10:19 | Permanent Link | Comments (0) |

Finishing python's library

By now I have written  all the fucs(SMS ,voicecall,addressbook ) into the library of python .It is very important for the next work. And I have written some python's cgis to test these libraries.All of them can be run ! In addition,because of many operations about addressbook ,I encapsulated these operations in a python's library,just like C++(Class and Member's function).
Posted by JiangBo at 19:26:44 | Permanent Link | Comments (0) |

By modify the library of the libvocenabler ,voicecall service can be encapsulated as a python API (Module) ,and can be invoked by python cgi .Great!

Posted by JiangBo at 15:45:13 | Permanent Link | Comments (0) |

I think the problem of voicecall service which encapsulated by python comes from sim card.The phoneserver can not be run now .So programmes do not have bugs , I think maybe.

Posted by JiangBo at 17:01:04 | Permanent Link | Comments (0) |

Voicecall service can be encapsulated as a python API (Module) ,but it has a little bug .

When run the python script for voicecall.so ,it will notice that   ImportError: /mnt/doc/nfs/nfs/share/python-2.5.1/lib/python2.5/libvoicecall.so: undefined symbol: voc_send_dtmf.

But exe file for voicecall do not have this problem.

It is strange. 

Posted by JiangBo at 18:59:41 | Permanent Link | Comments (0) |