Galaxy Expand – High Availability UCX Configuration
The Galaxy Expand is ideally suited for creating a High Availability solution through the use of redundant Server Cards. The chassis is always equipped with dual power supplies providing maximum protection against power outages, as the two power supplies can be connected to different power circuits. A High Availability deployment using Galaxy Expand can be configured using two separate chassis with a server card in each one, or even a single chassis with two installed server cards. When using the two chassis configuration, as per the High Availability – Installation and Configuration documentation, the two systems must be installed on the same Layer 2 network for proper signaling communication between the two server cards. When using a single chassis the two cards are already connected directly to each other on the same Layer 2 network since they communicate across the chassis backplane.

Supported Hardware

Required cards

When deployed as a High Availability Redundant Configuration (HARC) UCx server, the configuration requires two identical Galaxy Expand Server Cards. The choice of which Server card is based upon the number of extensions required or the number of simultaneous calls required for the call server.  The capacities of the server cards is described in Galaxy Expand – Platform Hardware

Optional Cards

In a HARC system, all connecting equipment must use IP communication between the UCx and itself. Supported Galaxy telephony cards include the DSM16, PRI, and FXS16, and the 8 port FXO, FXS, and FXO/FXS Combo Ethernet enabled cards as noted in Galaxy Expand – Platform Hardware

Network Connection and Configuration

Slot assignment for Server Cards

When deploying the Galaxy Expand as a High Availability UCX server using the two chassis configuration, you will be required to install one of the selected Galaxy Expand Server Cards in slot 7a on each chassis as noted in Galaxy Expand – Platform Hardware. In a single chassis configuration, one Server card must be installed in slot 7a and the other server card can be placed in slot 2a. Note that when the single slot 2930 Call Server card is used the corresponding “b” slot for that location should be covered with a blank card slot cover.

Slot Assignment for Telephony Cards

In the two-chassis HARC configuration, the telephony cards can be installed in any of the 10 slots available on either chassis. If a single chassis is used, these can be configured in any of the nine unused slots. Note that for an all IP based configuration with only IP telephones and SIP trunks, no telephony cards are required. For details on how to configure the optional Telephony Interface Cards, refer to the following:
  1. DSM16 Card (Ethernet Enabled)
  2. PRI Card (Ethernet Enabled)
  3. Analog Card (Ethernet Enabled)