104 TYPE R Radio Production System AoIP Network Examples
Redundancy
Calrec AoIP products support network redundancy, meaning that each device has pairs of A and B AoIP network connections.
It is not essential to have both connected, however it is recommended in order to provide resilience for network traffic.
Both A and B connections can be passed over the same physical switching hardware, but to provide the best redundancy, it is
recommended that A and B are passed over physically separate networks.
With AoIP redundancy based on ST2022-7, there is no real “primary” and “secondary” - devices are free to receive audio from either A
or B networks seamlessly on a packet by packet basis. Type R Core redundancy however is a complete failover system, only one core
of a redundant pair is truly active at a given time. For complete redundancy, both primary and secondary cores should each connect to
both A and B audio networks.
Switch Port Quantities
Type R I/O boxes have two A/B pairs of 1Gbps AoIP connections. Type R Cores can be supplied without any AoIP Interfaces fitted,
in which case although the two pairs of AoIP connectors are fitted, these will not be functional. Optionally one or two AoIP Interfaces
may be fitted, the second card doubling the Core audio capacity.
In addition to providing switch ports for each devices’ Audio over IP connections, at least one switch port needs to be available on each
AoIP network as a whole for a Connect server to communicate with devices on that network.
Typically, Connect will be served by a Type R core via the Core Surface connections. It should interface with both A and B networks in
order to provide redundant communications with all devices. A backup Connect server should also be considered, though having an
active Connect server will not be an on-air critical requirement for many users who will have a fairly static network configuration. Type
R cores can be configured to act as Connect servers, but only one server is needed per network.
At least one spare additional AoIP network switch port should normally also be available on each network for System Administration, to
allow engineers access to network and 3rd party device configuration and diagnostics.
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