UdaySanghvi

This maybe a kindergarden level answer, but I missed it when I was testing mine. As the help manual says, be sure to set the rings before answer to at least TWO RINGS. Caller ID information is transmitted between the 1st and 2nd rings. Like I said, I missed that one myself.. I am a Male of the species, and incapable of reading instructions until forced to. 

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I am aware of this fact. I have already set the rings to 4 rings. Still no caller id.

IVM shows Caller Id as unknown. I have motorola sm56 speakerphone modem. I know it supports caller id. I have caller id facility from my telephone company. My Caller id instrument shows the caller id. But IVM does not. I stay in Mumbai, India

Can somebody help?