| 摘要 |
A CTI system comprising a switch and a CTI controller therefor, a plurality of telephones connected to the switch, and a telephony card connected to the switch. When an incoming call is received for a user who has specified multiple telephone alerting, including a remote telephone, the CTI controller commands the switch to route the call to the card, generates a second call ID which is different from the first call ID already allocated by the switch for the incoming call, commands the card to make an outgoing call, associated with that second call ID, via the switch to the remote telephone, and to join the calls when the outgoing call is answered. The card will now be able to monitor the network signalling and report to the CTI controller when the remote telephone clears down. The association of a different call ID with the outgoing leg from the telephony card prevents an Automatic Route Optimisation function of the switch from clearing down the legs to and from the telephony card and joining the incoming and outgoing calls via its internal switching mechanism, which would result in the consequent loss of monitoring ability for the telephony status of that call.
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