AudioCodes Mediant 800B User Manual page 332

Mediant 800B Gateway and E- SBC
As each SIP Interface defines a different Layer-3 network (see ''Configuring SIP Interfaces''
on page 342 for more information) on which to route or receive calls and as you can assign
multiple SIP Interfaces to the same SRD, for most deployment scenarios (even for multiple
Layer-3 network environments), you only need to employ a single SRD to represent your
VoIP network (Layer 5). For example, if your VoIP deployment consists of an Enterprise IP
PBX (LAN), a SIP Trunk (WAN), and far-end users (WAN), you would only need a single
SRD. The single SRD would be assigned to three different SIP Interfaces, where each SIP
Interface would represent a specific Layer-3 network (IP PBX, SIP Trunk, or far-end users)
in your environment. The following figure provides an example of such a deployment:
Figure 17-6: Deployment using a Single SRD
User's Manual 332 Document #: LTRT-10296