# US 11,909,787 B1 · Videoconference content sharing for public switched telephone network participants > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,787 B1 - Document ID: US11909787B1 - Status: Granted - Kind: B1 - Application number: 17/710,294 - Filed: 2022-03-31 - Granted: 2024-02-20 - Earliest claimed: 2022-03-31 - Assignees: Amazon Technologies, Inc. - Applicants: Amazon Technologies, Inc. - Inventors: John Joseph Dunne; Siddhartha Shankara Rao; Michael Mark Goodwin - Web page: https://patentgrep.com/patent/US11909787B1 ## CPC - H04L 65/403: Arrangements for multi-party communication, e.g. for conferences (data switching systems for conference H04L12/18; arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities H04M3/56; television conferencing systems H04N7/15) - H04L 65/1089: by adding media; by removing media - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A videoconference among a plurality of participants may be hosted, wherein the plurality of participants comprise Internet Protocol (IP)-connected participants and a Public Switched Telephone Network (PSTN)-connected participant. The IP-connected participants may send and receive audio content and video content of the videoconference via IP-based connections. The PSTN-connected participant may send and receive the audio content of the videoconference via a PSTN connection. Additional content from the videoconference may also be transmitted to the PSTN-connected participant, for example as text messages via the PSTN connection. The additional content may include, for example, images of a videoconference screen share, chat posts, polls, and the like. Images may be transmitted in the additional content based on video status change events, such as switching slides or pages in a screen share. In some examples, bidirectional messaging may allow contents of text messages from the PSTN-connected user to be displayed in the videoconference. ## Claims ### Claim 1 A computing system comprising: one or more processors; and one or more memories having stored therein instructions that, upon execution by the one or more processors, cause the computing system to perform computing operations comprising: hosting, by a conferencing service, a videoconference among a plurality of participants, wherein the plurality of participants comprise Internet Protocol (IP)-connected participants and a Public Switched Telephone Network (PSTN)-connected participant, wherein the IP-connected participants are connected to the videoconference via IP-based connections, wherein the IP-connected participants send and receive audio content of the videoconference and video content of the videoconference via the IP-based connections, wherein the PSTN-connected participant is connected to the videoconference via a PSTN connection, wherein the PSTN-connected participant sends and receives the audio content of the videoconference via the PSTN connection; monitoring, by the conferencing service, the videoconference to detect one or more video status change events within the videoconference; detecting, by the conferencing service, that a first video status change event of the one or more video status change events occurs within the videoconference; selecting, by the conferencing service, based on the first video status change event, an image corresponding to a portion of the video content of the videoconference for transmission to a first device associated with the PSTN-connected participant; and transmitting, by the conferencing service, the image to the first device. ### Claim 2 (depends on 1) The computing system of claim 1, wherein the first video status change event comprises switching to a slide or page in a computer display share of the video content of the videoconference. ### Claim 3 (depends on 1) The computing system of claim 1, wherein the first video status change event comprises scrolling a document over a threshold amount in a computer display share of the video content of the videoconference. ### Claim 4 (depends on 1) The computing system of claim 1, wherein the first video status change event comprises a switch in focus between application windows displayed in a computer display share of the video content of the videoconference. ### Claim 5 A computer-implemented method comprising: hosting, by a conferencing service, a videoconference among a plurality of participants, wherein the plurality of participants comprise Internet Protocol (IP)-connected participants and a Public Switched Telephone Network (PSTN)-connected participant, wherein the IP-connected participants are connected to the videoconference via IP-based connections, wherein the IP-connected participants send and receive audio content of the videoconference and video content of the videoconference via the IP-based connections, wherein the PSTN-connected participant is connected to the videoconference via a PSTN connection, wherein the PSTN-connected participant sends and receives the audio content of the videoconference via the PSTN connection; monitoring the videoconference to detect that a first video status change event occurs within the videoconference; selecting, by the conferencing service, based on the first video status change event, an image corresponding to a portion of the video content of the videoconference for transmission to a first device associated with the PSTN-connected participant; and transmitting, by the conferencing service, the image to the first device. ### Claim 6 (depends on 5) The computer-implemented method of claim 5, wherein the transmitting of the image to the first device is performed via the PSTN connection. ### Claim 7 (depends on 5) The computer-implemented method of claim 5, wherein the transmitting of the image to the first device is performed via a text messaging protocol. ### Claim 8 (depends on 5) The computer-implemented method of claim 5, wherein the first video status change event comprises one of the plurality of participants joining the videoconference. ### Claim 9 (depends on 5) The computer-implemented method of claim 5, wherein the first video status change event comprises switching to a slide or page in a computer display share of the video content of the videoconference. ### Claim 10 (depends on 5) The computer-implemented method of claim 5, wherein the first video status change event comprises scrolling a document over a threshold amount in a computer display share of the video content of the videoconference. ### Claim 11 (depends on 5) The computer-implemented method of claim 5, wherein the first video status change event comprises a scene change of a video that is displayed in a computer display share of the video content of the videoconference. ### Claim 12 (depends on 5) The computer-implemented method of claim 5, wherein the first video status change event comprises a switch in focus between application windows displayed in a computer display share of the video content of the videoconference. ### Claim 13 (depends on 5) The computer-implemented method of claim 5, wherein one or more machine learning algorithms detect occurrence of the first video status change event. ### Claim 14 (depends on 5) The computer-implemented method of claim 5, wherein the first device is used by the PSTN-connected participant to send and receive the audio content of the videoconference. ### Claim 15 (depends on 5) The computer-implemented method of claim 5, wherein the first device is different from a second device used by the PSTN-connected participant to send and receive the audio content of the videoconference. ### Claim 16 One or more non-transitory computer-readable storage media having stored thereon computing instructions that, upon execution by one or more computing devices, cause the one or more computing devices to perform computing operations comprising: hosting, by a conferencing service, a videoconference among a plurality of participants, wherein the plurality of participants comprise Internet Protocol (IP)-connected participants and a Public Switched Telephone Network (PSTN)-connected participant, wherein the IP-connected participants are connected to the videoconference via IP-based connections, wherein the IP-connected participants send and receive audio content of the videoconference and video content of the videoconference via the IP-based connections, wherein the PSTN-connected participant is connected to the videoconference via a PSTN connection, wherein the PSTN-connected participant sends and receives the audio content of the videoconference via the PSTN connection; monitoring the videoconference to detect that a first video status change event occurs within the videoconference; selecting, by the conferencing service, based on the first video status change event, an image corresponding to a portion of the video content of the videoconference for transmission to a first device associated with the PSTN-connected participant; and transmitting, by the conferencing service, the image to the first device. ### Claim 17 (depends on 16) The one or more non-transitory computer-readable storage media of claim 16, wherein the transmitting of the image to the first device is performed via the PSTN connection. ### Claim 18 (depends on 16) The one or more non-transitory computer-readable storage media of claim 16, wherein the first device is a fax machine.