A method in which a high-quality packet telephony terminal apparatus performing low-latency and lossless packet communication with a counterpart packet telephony terminal apparatus operates in an integrated network structure in which a time sensitive network (TSN) and a packet communication network are combined may be disclosed. The packet telephony terminal apparatus may perform packet telephony call processing, perform a TSN stream reservation procedure when the counterpart packet telephony terminal apparatus is capable of performing a TSN function for lossless packet communication, adjust a size of a dejitter buffer when the TSN stream reservation procedure is successful, and perform low-latency packet telephony communication through the minimized size of the dejitter buffer.

A method for distributing Sigtran connections among signal transfer point (STP) message processors includes providing a connection load balancer as a front end to plural message processors of an STP. The method further includes publishing, by the connection load balancer, an Internet protocol (IP) address to SS7 peers. The method further includes initializing the message processors of the STP to listen on the IP address published by the connection load balancer. The method further includes receiving, at the connection load balancer, a Sigtran message addressed to the IP address. The method further includes determining, by the connection load balancer, whether the Sigtran message is an initial message for a Sigtran connection or a subsequent message for a Sigtran connection and whether the Sigtran connection has been assigned to one of the message processors. The method further includes forwarding the message to one of the message processors or dropping the message based on whether the message is an initial message or a subsequent message and based on whether the connection has been assigned to one of the message processors.

A method for distributing Sigtran connections among signal transfer point (STP) message processors includes providing a connection load balancer as a front end to plural message processors of an STP. The method further includes publishing, by the connection load balancer, an Internet protocol (IP) address to SS7 peers. The method further includes initializing the message processors of the STP to listen on the IP address published by the connection load balancer. The method further includes receiving, at the connection load balancer, a Sigtran message addressed to the IP address. The method further includes determining, by the connection load balancer, whether the Sigtran message is an initial message for a Sigtran connection or a subsequent message for a Sigtran connection and whether the Sigtran connection has been assigned to one of the message processors. The method further includes forwarding the message to one of the message processors or dropping the message based on whether the message is an initial message or a subsequent message and based on whether the connection has been assigned to one of the message processors.

A method in which a high-quality packet telephony terminal apparatus performing low-latency and lossless packet communication with a counterpart packet telephony terminal apparatus operates in an integrated network structure in which a time sensitive network (TSN) and a packet communication network are combined may be disclosed. The packet telephony terminal apparatus may perform packet telephony call processing, perform a TSN stream reservation procedure when the counterpart packet telephony terminal apparatus is capable of performing a TSN function for lossless packet communication, adjust a size of a dejitter buffer when the TSN stream reservation procedure is successful, and perform low-latency packet telephony communication through the minimized size of the dejitter buffer.