ESBC9628 Features
Features | Specifications | Datasheet

Overview
Designed for Service Providers offering SIP Trunking, Hosted Voice and high-speed Gigabit data services, InnoMedia’s ESBC 9628 is a highly cost-effective and highly manageable Enterprise Session Border Controller (ESBC) that can be auto-provisioned and remotely managed. It is ideally suited to wide deployment by broadband service providers addressing SIP-PBX interoperability for SIP Trunking (Figure 1) as well as providing NAT Traversal for Hosted PBX Services (Figure 2).

Figure 1 – SIP Trunk to IP PBX Solution based on B2BUA

Figure 2 – Hosted PBX Solution based on SIP ALG

The ESBC9628, located at the edge of the broadband access network, can be managed by the service provider with secured HTTPS-based auto-provisioning and SNMP-based remote management. It offers an ideal demarcation between the Service Provider and enterprise customer networks.

Security Features
InnoMedia’s ESBC9628 is also designed from the ground-up to offer high security with features such as:

• TLS for secured SIP signaling
• SRTP for secure voice traffic on the link between teh ESBC and the Service Provider network
• Wireguard/OpenVPN client support for secured access between the ESBC and the Service Provider network
• Stateful SIP firewall to protect voice streams from unauthorized access
• Access Control for specified interfaces/ports to prevent undesirable access attempts, scanning etc.

SIP Trunking Solutions
For Service Providers offering SIP Trunking service to enterprise customers with diverse IP-PBX and network configurations, the ESBC9628 SIP normalization, NAT traversal, topology hiding, and security.

The ESBC includes B2BUA for SIP normalization, a Registrar for User Agent (UA) registration and NAT traversal with full SDP address translation. The SIP UA (for instance, an IP-PBX) registers to and communicates with the ESBC, which terminates SIP UA traffic and re-initiates normalized SIP packets to communicate with the Service Provider’s network servers.

For SIP normalization, the ESBC9628 provides Profile-based settings, high-level classification for interoperability with Service Provider SIP Servers, and low-level header manipulation for SIP signaling normalization.

Hosted PBX Solutions
The SIP ALG traffic path enables service providers to offer Hosted Voice Services with NAT traversal and header manipulation. It allows authorized hosted SIP traffic from registered SIP UAs (e.g., IP Phones) to traverse through and communicate with the network servers. The SIP UAs register to the designated network servers, and point to the ESBC as the default gateway to route the packets. It can also route non-voice traffic between LAN and WAN interfaces (provisioning, NTP etc.). The service provider can also view a list of currently registered LAN-side Hosted clients.

FXS Ports with Business-Friendly Features
InnoMedia’s ESBC9628 includes 4x FXS voice ports that deliver revenue-generating telephony services to their enterprise customers. These FXS ports offer a rich set of business features including:

• Ground start/loop start and OSI for business PBX’s
• Foreign voltage detection
• T.38 and G.711 fallback fax support
• Reliable low-speed modem transmission for credit card reader transactions

Network Ports and Redundancy
The ESBC9628 offers 2x Gigabit Ethernet WAN Network ports and 3x Gigabit Ethernet LAN Network ports.

The WAN ports can be configured for WAN redundancy with automatic detection and failover from the primary interface to the secondary one. Revertive mode also provides automatic failback to the primary.

Emergency Call Handling
Special call handling is provided for emergency calls:

• Line pre-emption to always allow emergency calls to proceed, regardless of session limits by either capturing an idle line or, if none is available, taking over the resources of a non-emergency call
• Media manipulation to force the codec used and disabling of Voice Activity Detection
• Overriding the Caller ID and Caller Name information in the call
• Setting the SIP priority header to ’emergency’
• Setting the TOS/DiffServ codepoint to a high-priority, configured value
• Sending a syslog message and SNMP trap to indicate an emergency call

Call Monitoring and Quality
InnoMedia ESBC devices send VoIP metrics such as Packet Loss, Jitter, Delay, R-factor, MOS to multiple collection points:

• To a centralized call quality management server such as the InnoMedia EMS
• To a syslog server
• To an SNMP trap collector when quality thresholds are breached
• To a Telemetry Collector via SIP PUBLISH messages
• The ESBC also stores R-factor, MOS statistics internally on the device for access through the Web GUI

For more details, please see: Call Monitoring and Quality.

Call Flow Ladder Diagrams
Ladder diagrams are provided for SIP-to-SIP calls. These show the high-level call flow between SIP endpoints, as well as detailed signaling messages. These traces are saved on the device and can be exported in Wireshark format for external analysis.