Read Timeout specifies how long the edge server should wait for a response from the requesting forward server after a connection has already been established. Any failure to read aborts the request and sends a 504 Gateway Timeout error to the client. Contact Akamai Professional Services for help configuring this behavior.
You can set the Timeout value from 1 through 599 seconds, or from 1 through 9 minutes. This value should never be zero.