Client (Source)
Transport protocol         Source                  Destination               Comments
TCP                        X                       8888                      Server (Commands)
UDP                        18501                   18500                     Server (Voice)
UDP                        18501                   18501                     Intercom
                                                                             (Communication
                                                                             between Dispatchers)
                                                                             Data/Commands
TCP                        18501                   18501                     Intercom
                                                                             (Communication
                                                                             between Dispatchers)
                                                                             Voice
UDP/TCP                    5060                    5060                      Telephone
                                                                             Interconnect
                                                                             (Commands)
UDP                        18600-18650             X                         Telephone
                                                                             Interconnect (Voice)
Server (Source)
Transport protocol        Source                   Destination             Comments
TCP                       8888                     X                       Client (Commands)
UDP                       18500                    18501                   Client (Voice)
TCP                       X                        110,25,587              E-mail Gateway
                                                   (with SSL) 995(POP3),
                                                   993(IMAP4)
UDP                       161                      161                     SNMP (Monitoring)
                          162
UDP/TCP                   5060                     5060                    Telephone Interconnect
                                                                           (Commands)
UDP                       18600-18610              X                       Telephone Interconnect
                                                                           (Voice)
TCP                       X                        8002                    Connection to Control
                                                                           Station
UDP                       4001                     4001                    Only for Control Station
                          4005                     4005                    Configuration:
                          4007                     4007                     (4001 - Location
                          4008                     4008                    Service, 4005 -
                                                                           Registration Service,
                                                                           4007 - Messaging
                                                                           Service, 4008 -
                                                                           Telemetry Service)
UDP                       50000                    50000                   Only for Repeater
                                                                           Configuration
5060 – Port is set by default and can be changed
4001 – Port cannot be changed