Allied Telesis AT-S101 - Manual (Page 102)

Chapter 8: Simple Network Management Protocol (SNMP)
102
Trap receivers are the devices, typically management workstations or
servers, that you want to receive the traps sent by the switch. You specify
the trap receivers by their IP addresses. You assign the IP addresses to
the community strings.
Each community string can have up to eight trap IP addresses.
It does not matter which community strings you assign to the trap
receivers. When the switch sends a trap, it looks at all the community
strings and sends the trap to all trap receivers on all community strings.
This is true even for community strings that have a access mode of Read
only.
If you are not interested in receiving traps, then you do not need to enter
the IP addresses of trap receivers.