AudioCodes Mediant 3000 User Manual page 34

Configuration Terms
SRD
IP Profile
Classification
User's Manual
The SRD is a logical representation of your entire SIP-based VoIP
network (Layer 5) containing groups of SIP users and servers. The SRD
is in effect, the foundation of your configuration to which all other
previously mentioned configuration entities are associated. For example,
if your VoIP network consists of three SIP entities -- a SIP Trunk, a LAN
IP PBX, and remote WAN users -- the three SIP Interfaces defining these
Layer-3 networks would all assigned to the same SRD.
Typically, only a single SRD is required and this is the recommended
configuration topology. As the device provides a default SRD, in a single
SRD topology, the device automatically assigns the SRD to newly created
configuration entities. Thus, in such scenarios, there is no need to get
involved with SRD configuration.
Multiple SRDs are required only for multi-tenant deployments, where it
"splits" the device into multiple logical devices. For multiple SRDs, the
SRD can be configured with a Sharing Policy. The Sharing Policy simply
means whether the SRD's resources (SIP Interfaces, IP Groups, and
Proxy Sets) can be used by other SRDs. For example, if all tenants route
calls with the same SIP Trunking service provider, the SRD of the SIP
Trunk would be configured as a Shared Sharing Policy. SRDs whose
resources are not shared, would be configured with an Isolated Sharing
Policy.
The IP Profile is an optional configuration entity that defines a wide range
of call settings for a specific SIP entity (IP Group). The IP Profile includes
signaling and media related settings, for example, jitter buffer, silence
suppression, voice coders, fax signaling method, SIP header support
(local termination if not supported), and media security method. The IP
Profile is in effect, the interoperability "machine" of the device, enabling
communication between SIP endpoints that "speak" different call
"languages".
The IP Profile is associated with the SIP entity, by assigning the IP Profile
to the IP Group of the SIP entity.
Classification is the process that identifies the incoming call (SIP dialog
request) as belonging to a specific SIP entity (IP Group).
There are three chronological classification stages, where each stage is
done only if the previous stage fails. The device first attempts to classify
the SIP dialog by checking if it belongs to a user that is already registered
in the device's registration database. If this stage fails, the device checks
if the source IP address is defined for a Proxy Set and if yes, it classifies it
to the IP Group associated with the Proxy Set. If this fails, the device
classifies the SIP dialog using the Classification table, which defines
various characteristics of the incoming dialog that if matched, classifies
the call to a specific IP Group. The main characteristics of the incoming
call is the SIP Interface that is associated with the SRD for which the
Classification rule is configured.
34
Description
Document #: LTRT-89730
Mediant 3000