| CPC H04L 63/12 (2013.01) [H04L 65/1104 (2022.05); H04L 69/08 (2013.01); H04M 3/436 (2013.01); H04W 12/069 (2021.01); G06Q 30/0185 (2013.01); H04M 2203/6045 (2013.01)] | 26 Claims |

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1. An apparatus, comprising:
a network interface operable to receive, over a communication link of a first network according to a first signaling protocol, a communication request that requests voice call communication between two or more user devices; and
a processor communicatively coupled to the network interface and operable to:
verify caller information in the communication request with a certification procedure;
after verifying the caller information, generate a first indicator indicating that the communication request has been verified, wherein the first indicator is associated with a first certificate management procedure;
generate, based on the first indicator, a second indicator associated with a second certificate management procedure;
convert the communication request to a second signaling protocol used in a second network;
after generating the first indicator, transmit the converted communication request according to the second signaling protocol;
after transmitting the converted communication request, receive a verification request from a network; and
transmit the second indicator to the network in response to the verification request.
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