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When I check Outgoing Caller ID Block, Caller ID is still sent. Why?

April 26, 2017block Caller Id outgoing sent

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When I check Outgoing Caller ID Block, Caller ID is still sent. Why?

1 Answer

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A. The LAN Modem sets a bit in the outgoing call setup message to suppress Caller ID. If the telephone switch the LAN Modem is connected to is configured to respond to this bit setting, then outgoing Caller ID will be blocked. If you have checked Outgoing Caller ID Block and Caller ID is still being sent then your telephone switch is either running older software, or is not configured to recognize this bit. In this case, you can still block Caller ID by dialing the usual Caller ID blocking prefix (usually *67).