A communications manager in a telecommunications transaction server communicates service request messages and service response messages between one or more remotely executing service request processes and one or more service applications executing on the transaction server. A main thread in the communications manager monitors connections requests and initializes other threads. A unique logical communications connection is established between one of the service request processes and the communications manager. The communications manager creates both a read thread and a write thread for each logical communication connection that is validated and active. The read thread communicates service request messages from a service request process to an appropriate service application. The write thread communications service response messages from the service application to the service request process that issues the service request message. A monitor thread collects service response messages from a queue and directs them to the appropriate write threads via an in-memory write queue.