Branch Gateway dynamically allocates announcement time slots for announcement ports on an as-needed basis. This flexibility provides greater assurance of having time slots available for voice calls. However, Branch Gateway can also potentially run out of time slots for voice calls. To protect Branch Gateway from running out of time slots, use the set fault-threshold timeslot command, which determines at what level of time slots occupancy an SNMP trap is sent to the CM. If you see that Branch Gateway is often at 100% time slot capacity, you may need to add another Branch Gateway to your system.