When acting as a client to JP Morgan FX, the IAF should be configured with the JP Morgan FX specific configuration file, the distribution version of which can be found here:

Note that the requirement for a JPMC-specific configuration file means that an IAF using this configuration file must be used for JPMC FX FIX sessions only. The FIX adapter will not interoperate correctly with other FIX servers once it has been configured for JPMC operation. If you need to connect to other FIX servers as well as JPMC, the non-JPMC sessions should be configured in a separate IAF instance. However, JPMC and non-JPMC session can co-exist safely within the same correlator instance.

As well as the standard host, port, sender and target CompID the following parameters must be supplied for JPMC session:

For market data session

For trading session