ESBC9378-4B Features
Enterprise SIP Gateway (ESG) with Transcoding
Features | Specifications | Datasheet

Overview
ESBC9378-4B adds media transcoding capability to InnoMedia’s high performance and highly versatile Enterprise SIP Gateways (ESGs). It combines Enterprise Session Border Controller (ESBC), business line FXS ports, switched data port, media transcoding, and internal battery, all in one unit. ESBC9378-4B can be used by service providers to offer SIP trunks to enterprises with B2BUA for IP PBXs (Figure 1) or with SIP ALG for IP Centrex (Figure 2).

 Figure 1. ESG with B2BUA for IP PBXs

Figure 2. ESG with SIP ALG for IP Centrex

Service Usage Examples
Designed for Broadband Service Providers (BSPs) offering SIP trunking, hosted voice, and high-speed data services, InnoMedia’s ESBC9378-4B is a highly integrated and highly manageable Enterprise SIP Gateway (ESG) or Enterprise Session Border Controller (ESBC) that can be auto-provisioned and remotely managed. Equipped with VLAN and DSCP packet priority tagging, ESBC9378-4B is ideally suitable for BSPs offering bundled services with end-to-end quality of service over broadband service networks. Its B2BUA and SIP ALG capabilities enable wide deployment by BSPs addressing SIP-PBX interoperability for SIP Trunking as well as providing simple NAT Traversal for Hosted PBX Services. The two typical service scenarios for ESBC9378-4B are: 1. BSPs delivering high-speed Internet access as well as SIP trunks to enterprises with IP-based PBXs (Figure 3). 2. BSPs delivering high-speed Internet access as well as hosted PBX/IP Centrex to enterprises which will transition from legacy Centrex to IP Centrex (Figure 4).

Figure 3. BSPs delivering high-speed Internet access as well as SIP trunks to enterprises with IP-based PBXs

Figure 4. BSPs delivering high-speed Internet access as well as hosted PBX/IP Centrex to enterprises

In addition to the need for signaling normalization, in many deployments, issues often arise due to incompatibilities between the media handling capabilities of the IP-PBX used in the enterprise and those media capabilities the operator wishes to offer in the access/core part of their network.  For instance, there may differences caused by the use of in-band DTMF versus RFC 2833 to transport DTMF signals, or G.711 In-band versus T.38 to transmit fax in different parts of the network.  In addition, the enterprise IP-PBX may be capable of only offering certain speech codecs which differ from those used in the operator’s network. To get around these problems, ESBC9378 offers the following media transcoding alternatives between the WAN and LAN interfaces of the ESG as depicted in Figure 5:

• Codec Transcoding to/from any of G.711, G.729, G.726
• DTMF Transcoding between RFC2833 and G.711 In-band
• Fax Transcoding between T.38 and G.711 In-band

Figure 5.  Media Transcoding

Therefore, the InnoMedia ESBC9378 offers broadband service providers the ideal product for delivering scalable SIP Trunking and Hosted PBX services to their business customers through the incorporation of advanced features such as SIP normalization, NAT/Firewall Traversal, QoS management, Performance Monitoring and Media Transcoding which address specific problems normally associated with these deployments.