For Acano, resilience means that there must be no single point of failure anywhere in the system – that means within the Acano software itself, but importantly also in terms of those integration points with other equipment, and in the network used to communicate between the components of the system.

1. ACANO SOLUTION
Resilient Architecture

2. Why Resilience?
Because maintaining service under any
circumstance is critical for
a superior use experience
For Acano, resilience means that there must be
no single point of failure anywhere in the system –
the Acano software, network between the components, and integration points.

3. Acano Resilient Architecture
Edge Instance
Core Instance
NAT
traversal
Media
processing
and signaling
Instant messaging,
presence and
call control
WebRTC
database
Configuration
information and
stored messages
A single Acano software
image is divided into
components
Each system running the
software is referred to as an
“instance”
Each instance can:
• run a subset of components
• be on a Virtual Machine
(VM) or Acano Server
Multiple instances can work
together to form a single
system where each instance
is self-sufficient
typical deployment where edge functions in the DMZ are split from core functions

4. Achieving Resiliency
Acano client connects to the best
Edge instance
Each Edge instance connects to the
best Core instance (typically local)
Core instances have mesh of
connections between them for
distributed conferences/coSpaces
“best of both”: any mix of VMs and/or Acano Servers
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5. Resiliency at Edge and Core
Failure of a Core instance --
Only calls currently on those
instances are affected, the rest of
the system carries on
Failure of an Edge instance --
Calls routed via an alternative edge
instance in same or other location
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6. Resilient Integration
Multiple trunk
connections can be
configured for
automatic failover
Dialplan supports
different SIP trunks
configured at different
Acano instances in the
distributed system

7. Other Resiliency Measures
Secure Data Management
All persistent states of the system are in a
fully distributed and redundant SQL
database
Changing Network Conditions
TURN/STUN/ICE to perform NAT traversal
and to route media optimally between
locations
Distributed
By default all calls/conferences fully
distributed
Media processing for single
call/conference split across multiple
instances
Those instances can be co-located
in the same datacenter or
geographically distributed

8. www.acano.com