I have a customer with a mixture of 524g and 7960 phones connected to a UC500. They tell me they had it setup before to have different ring tones when they call each other in the office. Ext 204 calls, you get one ring tone. Ext 205 calls, you get another ring tone.
Based on calling number internally, there is not currently a way to have different ring tones. Each phone can have its own ring tone. You can have different line buttons on the phone have different ring tones. But, it will not ring differently based on who is calling internally.
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