Depending on the design version of the communications module A there are up to two communications channels available (see Chapter “Technical Data”). These physical communications channels may be assigned to communications interfaces COMM1 and COMM2.

If communications interface COMM1 is assigned to communications channel 2, then the settings of communications interface COMM2 are automatically assigned to communications channel 1.

COMM2 can only be used to transmit data to and from the P632 if its PC interface has been de-activated. As soon as the PC interface is used to transmit data, COMM2 becomes “dead”. It will only be enabled again when the "time-out" period for the PC interface has elapsed.