| 1. | At present , only calling authority and called authority are provided by vpmn service
目前业务提供的权限有：主叫权限和被叫权限。 |
| 2. | The short numbers of one group can only be used to call users of the same group
Vpmn集团编制的短号码只能用于拨打同一vpmn集团的网内用户。 |
| 3. | To deploy vpmn service smoothly , it is necessary to transform the existing network in the following ways
要能够顺利的开展vpmn业务，需要对网络进行如下改动： |
| 4. | To facilitate memory and management , a short number may identify a unique group member ( information like position and job number )
企业或集团申请了vpmn业务后，可以根据集团（企业）的特点制定自己内部的短号码编号方案。 |
| 5. | The vpmn may set up barred numbers . no users in all the groups which have subscribed to vpmn service can dial these numbers
系统可以设置系统禁拨号码，任何申请该项业务的所有集团内的vpmn用户都不能拨打被系统禁止拨打的电话号码。 |
| 6. | For intra - network calls , the vpmn use can either dial the short number defined by the group or the real number of the called user
在进行网内呼叫时， vpmn用户有两种拨号方式，既可以拨集团定义的短号码，也可以拨被叫用户的真实号码。 |
| 7. | Vpmn service operated in the plmn provides the mobile users in the user groups that have subscribed to the service with private network service similar to pbx service in the pstn
公用陆地移动通信网网内开放vpmn业务可以为申请了此业务的集团内的移动用户提供类似公用固定电话网中小交换机（ pbx ）的专用网络业务。 |
| 8. | Besides , vpmn service can give certain favorable treatment to the basic , roaming and total charges , thus saving call charges for businesses and retaining large customers for mobile operators . 3
Vpmn业务可以对集团用户基本费、漫游费、总费用中的一种和多种给予一定程度的话费优惠，为企业节省话费开支，为移动运营商留住大客户奠定了基础。 |
| 9. | To transform the boss system so as to enable it to execute vpmn service handling , accounting and statistics and add interfacing function between the vpmn and the smps and provide management of the users of the group by www terminals . 4
改造boss系统，使之具有vpmn业务营业受理、营帐和统计功能，并增加vpmn和smp之间的接口功能，向用户提供www终端对本集团用户的管理。 |
