A system and method are provided for controlling information flow from a channel service module (CSM) in an asymmetric channel environment. The method provides information for transmission to an OSI model PHY (physical) layer device with a channel buffer. The PHY device channel buffer current capacity is estimated. Information is sent to the channel buffer responsive to estimating the channel buffer capacity, prior to receiving a Polling Result message from the PHY device. Initially, Polling Request messages are sent to the PHY device, and Polling Result messages received from the PHY device, as is conventional. In response to analyzing the Polling messages, a transmission pattern is determined, which includes the amount of information to transmit and a period between transmissions.