Incoming Calls "Unknown number" on IP phone display | caller id is unknown
inbound or Incoming Calls "Unknown number" on IP phone display,
Now, If some calling From Outside to Internal IP Phones over PSTN lines Via FXO Card. Caller Number Its Not Appearing On the Telephone. its Showing Unknown Number. we had contact with PSTN they have already activated caller ID Feature moreover if connect the PSTN Analogue Line into a analog phone directly Number its Appearing During the Incoming Call.Yes, I have verified with service providers, unfortunately, we have "Analog DID trunks", so as per current telco policies, 'analog DID trunk will not display the number at destination point, it will display as unknown number, they recommended to go with PRI,or SIP , so we are planning to move all of our Canada offices to SIP trunking.
https://community.cisco.com/t5/ip-tel..., https://community.cisco.com/t5/ip-tel...