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  2. How to tell if someone blocked your number - AOL

    www.aol.com/2019-08-16-how-to-tell-if-someone...

    “The simplest way to tell if you have been blocked by an Android user is to call,” Lavelle says. Just like with an iPhone, listen for it to be diverted to voicemail or play you a pre-recorded ...

  3. Voice phishing - Wikipedia

    en.wikipedia.org/wiki/Voice_phishing

    Voice phishing, or vishing, [1] is the use of telephony (often Voice over IP telephony) to conduct phishing attacks.. Landline telephone services have traditionally been trustworthy; terminated in physical locations known to the telephone company, and associated with a bill-payer.

  4. Vertical service code - Wikipedia

    en.wikipedia.org/wiki/Vertical_service_code

    Permits the call to be picked up at another station. *53 1153 Distinctive Ring B. Allows a subscriber to alert a specific party distinctively. *54 1154 Distinctive Ring C. Allows a subscriber to alert a specific party distinctively. *57 1157 Call trace (Malicious caller identification) *60 1160 Call blocking *61 1161 Priority call *62 1162

  5. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    181 Call is Being Forwarded Servers can optionally send this response to indicate a call is being forwarded. [1]: §21.1.3 182 Queued Indicates that the destination was temporarily unavailable, so the server has queued the call until the destination is available. A server may send multiple 182 responses to update progress of the queue.

  6. Intercept message - Wikipedia

    en.wikipedia.org/wiki/Intercept_message

    If a phone receiver is left off-hook, some phone systems may use an intercept message to inform callers to hang up their phone receivers. The most common message reads as follows: If you'd like to make a call, please hang up and try again. If you need help, hang up and then dial your operator. A formerly-used variation of this message was as ...

  7. Call blocking - Wikipedia

    en.wikipedia.org/wiki/Call_blocking

    Call blocking, also known as call block, call screening, or call rejection, allows a telephone subscriber to block incoming calls from specific telephone numbers. This feature may require an additional payment to the subscriber's telephone company or a third-party. Call blocking is desired by individuals who wish to block unwanted phone calls.

  8. Operator assistance - Wikipedia

    en.wikipedia.org/wiki/Operator_assistance

    A messenger, usually a boy, would go to the recipient's location to advise him or her to come to a central location at a designated time to receive a phone call. An operator-assisted conference call is one in which the conference call is managed by an operator. The telephone operator will greet each call participant, gather specific information ...

  9. Blue box - Wikipedia

    en.wikipedia.org/wiki/Blue_box

    Originally, all calls were routed manually by an operator who would look for small light bulbs that would illuminate when a subscriber picked up the phone to make a call. The operator would connect a handset to the line, ask the user who they were calling, and then connect a cable between two phone jacks to complete the call. If the user was ...