Ofta has warned consumers not to buy international call forwarding services which use 8-digit paging Numbers 7xxx XXXX.

电讯管理局警告消费者不要购买使用8位数呼叫号码7xxx XXXX的国际呼叫转接服务。

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For example, while setting up or tearing down a connection, SIP services can also implement call blocking or forwarding, as well as interface with gaming and back office systems.

举例来说，当建立或拆开连接时，SIP服务还可以实现调用的阻塞或转发，以及带有对策和事务部门系统的界面。

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After decades of development, a standard phone gives users access to 2, 500 services, from 911 service to call forwarding.

FORBES: Wired and restless