A method for detecting a client-link failure in a dual link architecture comprising: a primary telephony (904, 1104, 1304) server in communication with at least one phone client (906, 1106, 1306) through a primary client-lint (902, 1302) formed using a network transport session protocol; a secondary telephony server (910, 1110, 1310) in communication with the at least one phone client through a secondary client-link (908, 1308) formed using a network transport session protocol; and a server-link (912, 1112, 1312) formed using a network transport session protocol between the primary and secondary telephony servers, the method comprising: detecting a primary client-link failure at the primary telephony server; sending a link-status-notice message from the primary telephony server to the secondary telephony server via the server link, the link-status-notice message comprising a severity indicator with a range of values, a total count of failed client-links, and a list of directory numbers of the at least one phone client associated with the client-link failure; sending a redirect command from the secondary telephony server to the at least one phone client associated with the client-link failure via the secondary client-link, wherein the type of redirect command is based on the value of the severity indicator and the total count of failed client-links. a primary telephony (904, 1104, 1304) server in communication with at least one phone client (906, 1106, 1306) through a primary client-lint (902, 1302) formed using a network transport session protocol; a secondary telephony server (910, 1110, 1310) in communication with the at least one phone client through a secondary client-link (908, 1308) formed using a network transport session protocol; and a server-link (912, 1112, 1312) formed using a network transport session protocol between the primary and secondary telephony servers, the method comprising: detecting a primary client-link failure at the primary telephony server; sending a link-status-notice message from the primary telephony server to the secondary telephony server via the server link, the link-status-notice message comprising a severity indicator with a range of values, a total count of failed client-links, and a list of directory numbers of the at least one phone client associated with the client-link failure; sending a redirect command from the secondary telephony server to the at least one phone client associated with the client-link failure via the secondary client-link, wherein the type of redirect command is based on the value of the severity indicator and the total count of failed client-links. detecting a primary client-link failure at the primary telephony server; sending a link-status-notice message from the primary telephony server to the secondary telephony server via the server link, the link-status-notice message comprising a severity indicator with a range of values, a total count of failed client-links, and a list of directory numbers of the at least one phone client associated with the client-link failure; sending a redirect command from the secondary telephony server to the at least one phone client associated with the client-link failure via the secondary client-link, wherein the type of redirect command is based on the value of the severity indicator and the total count of failed client-links.