Office Communications Server 2007 R2 interoperates with Acme Packet Session Border Controllers (SBCs) when used with SIP trunking to Internet telephony service providers (ITSPs). This article describes the supported topologies for using Office Communications Server 2007 R2 with Acme Packet SBCs.

Authors: Rui Maximo, Wajih Yahyaoui

Publication date: June 2010

Product version: Office Communications Server 2007 R2

Office Communications Server 2007 R2 now interoperates with Acme Packet Session Border Controllers (SBCs) Supported topologies are described in this article. Acme Packet and Microsoft work in close partnership to regularly test releases of Communications Server to ensure support of certain Unified Communications Open Interoperability Program (UCOIP) certified service providers that use Acme Packet SBCs. Acme Packet has also joined Microsoft in the Unified Communications Interoperability Forum (UCIF), ucif.org, as a founding member.

Acme Packet SBCs are used by many Internet telephony service providers (ITSPs) as part of their SIP trunking infrastructure. These SBCs can be used to support SIP trunk connectivity to Office Communications Server 2007 R2 Mediation Server on customer premises. In some instances, ITSPs may require a SBC to be deployed on the customer’s premises as part of the SIP trunk service for one or more of the following reasons:

  • Interworking functions   The service provider may support only specific signaling and media functions that are not supported by your environment. By deploying a SBC on customer premises, the service provider can resolve these differences.
  • Codecs compatibility   The service provider may choose to use a codec other than G.711 or RTAudio. The SBC deployed in the customer’s network converts the codec at the perimeter of the customer’s network. If the service provider supports the pass-through transit of RTAudio and RTVideo codecs, the Acme Packet SBCs are capable of supporting this function.
  • Quality of service   By deploying an SBC within the customer’s network perimeter that is managed by the ITSP, the service provider eliminates many of the complexities of interoperating with the customer’s systems and can guarantee better service quality.

There are three supported deployment models for using Acme Packet SBCs in conjunction with Office Communications Server 2007 R2 SIP trunk. The first two models involve connecting the Mediation Server directly to an Acme Packet SBC. These deployment models are shown in Figure 1 and 2. Figure 3 illustrates a third option. These deployment models are supported only when used for SIP trunk services that have been qualified through the UCOIP.

Read the complete article in the Technical Library.

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