Configuring number substitution

A number substitution rule list defines some number substitution methods, and is used wherever number substitution is necessary. There is no limitation on where and how many times it is used. Therefore, a number substitution rule list might be bound globally and bound to different voice entities and subscriber lines.

The characteristics of global calling/called number substitution or calling/called number substitution on voice entities and subscriber lines are as follows:

• Global number substitution—The voice gateway substitutes calling and called numbers of all incoming and outgoing calls according to the number substitution rules configured in dial program view. Multiple number substitution rule lists can be bound for global calling and called numbers substitution of incoming and outgoing calls. If there is no match in the first number substitution rule list, the voice gateway will match against other number substitution rule lists.

• Number substitution on voice entities—The voice gateway substitutes the calling and called numbers based on the number substitution rule lists bound to voice entities.

• Number substitution on a specific subscriber line—The voice gateway substitutes the calling and called numbers of incoming calls based on the number substitution rules configured on the receiving line.