Communication server and communication terminal

1. A communication server, comprising:

a memory storing computer readable instructions; and

at least one processor configured to execute the computer readable instructions to,

receive a call request including a phone number of a receiving terminal on a public switched telephone network (PSTN) via an IP network;

specify transmitting user information of a transmitting user using a transmission terminal transmitting the call request;

transmit an address of the transmission terminal on the IP network and the call request to a communication carrier having a gateway between the PSTN and the IP network; and

transmit the transmitting user information to the receiving terminal on short message service (SMS) via a transfer server or notify the transmitting user information to an application installed in the receiving terminal, wherein

the receiving terminal receives the transmitting user information in a case where the receiving terminal did not respond to a call based on the call request, and

the transmitting user information includes at least one of a name of the transmitting user, a nickname of the transmitting user and a phone number of the transmission terminal.

2. The communication server according to claim 1 , wherein the at least one processor is further configured to:

determine whether the transmitting user using the transmission terminal and a receiving user using the receiving terminal each have an account on a Social Network Service (SNS); and

in response to results of the determining indicating the transmitting user and the receiving user each having an account on the SNS, transmit the transmitting user information to the receiving terminal via the SNS.

3. The communication server according to claim 2 , wherein the at least one processor is further configured to notify the transmission terminal that the transmitting user information was transmitted to the receiving terminal via the SNS.

4. The communication server according to claim 2 , wherein in response to the results of the determining indicating the receiving user not having the account established on the SNS, the at least one processor is further configured to transmit the transmitting user information to the transfer server.

5. The communication server according to claim 2 , wherein in response to the results of the determining indicating the transmitting user and the receiving user each having the accounts established on the SNS and that the receiving terminal rejects an incoming call or communication from the transmission terminal, the at least one processor is further configured to transmit the transmitting user information to the transfer server.

6. The communication server according to claim 1 , wherein the transfer server is an SMS server.

7. The communication server according to claim 1 , wherein the at least one processor is further configured to transmit the transmitting user information to the transfer server after a call is connected between the transmission terminal and the receiving terminal in accordance with the call request.

8. The communication server according to claim 1 , wherein the at least one processor is further configured to:

assign the address of the transmission terminal; and

transmit the address and the call request to the communication carrier during a desired time period after the transmitting user information is transmitted to the transfer server; and

transmit the transmitting user information to the receiving terminal before a call is connected between the transmission terminal and the receiving terminal in accordance with the call request.

9. The communication server according to claim 1 , wherein the at least one processor is further configured to:

transmit the call request to the communication carrier before transmitting the transmitting user information to the transfer server.

10. The communication server according to claim 1 , wherein a communication path of the address of the transmission terminal and the call request is different from a communication path of the transmitting user information.

11. A communication method, comprising:

receiving, using at least one processor, a call request including a phone number of a receiving terminal on a public switched telephone network (PSTN) via an IP network;

specifying, using the at least one processor, transmitting user information of a transmitting user using a transmission terminal transmitting the call request;

transmitting, using the at least one processor, an address of the transmission terminal on the IP network and the call request to a communication carrier having a gateway between the PSTN and the IP network; and

transmitting, using the at least one processor, the transmitting user information to the receiving terminal on short message service (SMS) via a transfer server or notify the transmitting user information to an application installed in the receiving terminal, wherein

the receiving terminal receives the transmitting user information in a case where the receiving terminal did not respond to a call based on the call request, and

the transmitting user information includes at least one of a name of the transmitting user, a nickname of the transmitting user and a phone number of the transmission terminal.

12. The communication method according to claim 11 , further comprising:

determining, using the at least one processor, whether the transmitting user using the transmission terminal and a receiving user using the receiving terminal each have an account on a Social Network Service (SNS); and

in response to results of the determining indicating the transmitting user and the receiving user each have an account on the SNS, transmitting, using the at least one processor, the transmitting user information to the receiving terminal via the SNS.

13. The communication method according to claim 12 , further comprising:

notifying, using the at least one processor, the transmission terminal that the transmitting user information was transmitted to the receiving terminal via the SNS.

14. The communication method according to claim 12 , further comprising:

in response to the results of the determining indicating the receiving user does not have an account on the SNS, transmitting, using the at least one processor, the transmitting user information to the transfer server.

15. The communication method according to claim 12 , further comprising:

in response to the results of the determining indicating the transmitting user and the receiving user each have an account on the SNS and that the receiving terminal rejects an incoming call or communication from the transmission terminal, transmitting, using the at least one processor, the transmitting user information to the transfer server.

16. The communication method according to claim 11 , wherein the transfer server is an SMS server.

17. The communication method according to claim 11 , wherein the transmitting user information is transmitted to the transfer server after a call is connected between the transmission terminal and the receiving terminal in accordance with the call request.

18. The communication method according to claim 11 , further comprising:

assigning, using the at least one processor, the address of the transmission terminal;

transmitting, using the at least one processor, the address and the call request to the communication carrier during a desired time period after the transmitting user information is transmitted to the transfer server; and

transmitting, using the at least one processor, the transmitting user information to the receiving terminal before a call is connected between the transmission terminal and the receiving terminal in accordance with the call request.

19. The communication method according to claim 11 , further comprising:

transmitting, using the at least one processor, the call request to the communication carrier before the transmitting user information is transmitted to the transfer server.

20. The communication method according to claim 11 , wherein a communication path of the address of the transmission terminal and the call request is different from a communication path of the transmitting user information.