The HLR Router consists of an active/standby pair of NOAM servers in an HA configuration, a third NOAM server configured as a Query Server (optional), an optional DR NOAM, redundant SOAM servers, and up to 10 MP (Message Processor SCCP Relay Point) servers per SOAM site. An HLR Router can have up to 40 sites with each capable of supporting up to 512 remote signaling points.
Figure 1 provides an overview of the HLR Router architecture.
HLR Router System Diagram