Specifications

24 Reference Architecture | Dell
TM
Unified Communication Solution with Microsoft® Lync® Server 2013 for Single Site
Implementation | Version 1.0
The enterprise connectivity options, as shown in Figure 6, are:
T1/E1 connectivity from PSTN to a media gateway, which in turn connects to the Lync
infrastructure via SIP
SIP trunk from an ITSP to an SBC, which then connects to Lync infrastructure via SIP
PBX connecting to a media gateway via a T1/E1, which in turn connects to the Lync infrastructure
via SIP
If connecting to a SIP trunk via an on-premise SBC, consider placing the SBC in the perimeter network to
provide the appropriate level of security. If connecting directly to a SIP trunk provider without an
intermediary SBC, a separate Mediation Server may be required. The preferred third-party gateway, as
validated in this reference architecture, is the Sonus SBC 1000 or SBC 2000.
Figure 6 Enterprise Voice Connectivity