Brand new CUC 7.1.3 cluster.
When calling a port on the secondary server (subscriber), there is about 30 seconds of dead air after signin (after password). The same goes for leaving a message: long delay before hearing the "beep".
Everything works fine if I call a port on the primary server.
If I make the subscriber the primary CUC server, then it starts working well, and the problem is moved to the publisher.
DNS not configured.
Replication state is good on both servers (state=2).
Thanks for your help,