Unlike CCITCP, there is no central registration module for CCINAMPU. Any Server Name given to CCINAMPU as a relative pipe name, for example, "SRVS" appears as a pipe-file in the directory /usr/spool/uucppublic/.cci/.SRVS.
These are not normal files but they are affected by access permissions. So, if a server doesn't respond to a client's request, the first check should be made on access permissions. All files, and the directory itself, should have READ and WRITE permissions for all processes.