Performance impact

Call Charge Information can have an impact on system performance in several ways. The information that comes in over ISDN trunks takes up bandwidth, and reduces the maximum amount of traffic that the ISDN D-channel can handle. This is especially true in countries such as Germany and France, where the network sends charging information updates as often as every 3 to 10 seconds for each active international call.

The number of telephones that display charge information and the frequency of updates also affect performance. Usually, the update frequency matches the average rate at which call charge updates are received from the public network.