Capacities

• Max Signalling: 250
• Max. RTP/STRP Sessions: 250/250
• Max. Transcoding Sessions: 57
• Max. Registered Users: 1500

Telephony Interfaces:

• Analog: 4/8/12 FXS ports; 4/8/12 FXO ports
• Digital: Up to 4 E1/T1 interfaces; 4/8 BRI Ports
• Clock Source: 5 ppm High Precision
• Digital PSTN Protocols: Various ISDN PRI protocols such as EuroISDN, North American NI-2, LucentTM 4/5ESS, NortelTM DMS- 100 and others. Different CAS protocols, including MFC R2,

Network Interfaces

• Ethernet 4 GE or 4 GE + 8 FE interfaces configured in 1+1 redundancy or as individual ports

Security

• Access Control: DoS/DDoS line rate protection, bandwidth throttling, dynamic blacklisting (Intrusion Detection System)
• VoIP Firewall: RTP pinhole management, rogue RTP detection and prevention, SIP message policy, advanced RTP latching
• Encryption/Authentication: TLS, DTLS, SRTP, HTTPS, SSH, client/server SIP Digest authentication, RADIUS Digest
• Privacy: Topology hiding, user privacy
• Traffic Separation: VLAN/physical interface separation for multiple media, control and OAMP interfaces
• Intrusion Detection System: Detection and prevention of VoIP attacks, theft of service and unauthorized access

Interoperability

• SIP B2BUA: Full SIP transparency, mature and broadly deployed SIP stack, stateful proxy mode
• SIP Interworking: 3xx redirect, REFER, PRACK, session timer, early media, call hold, delayed offer and more
• Registration and Authentication: SIP Registrar, registration on behalf of users/servers, SIP Digest access authentication
• Transport Mediation: Mediation between SIP over UDP/TCP/TLS/WebSocket, IPv4/IPv6, RTP/SRTP (SDES/DTLS)
• Header Manipulation: Add/modify/delete SIP headers and message body using simple WireShark-like language with powerful capabilities such as variables and utility functions
• Number Manipulations: Ingress and egress digit manipulation
• Transcoding and Vocoders Coder normalisation including transcoding, coder enforcement and re-prioritization, extensive vocoder support: G.711, G.723.1, G.726, G.729, GSM-FR, AMR-NB, AMR-WB (G.722.2), SILK-NB/WB, Opus-NB/WB
• Signal Conversion: DTMF/RFC 2833/SIP, T.38 fax, T.38 V3, V.34, packet-time conversion, V.150.1
• WebRTC Gateway: Interworking between WebRTC endpoints and SIP networks. Supports WebSocket, Opus, VP8 video coder, lite ICE, DTLS, RTP multiplexing.
• NAT Local and far-end NAT traversal for support of remote workers

Voice Quality and SLA

• Call Admission Control: Limit number and rate of concurrent sessions and registers per peer for inbound and outbound directions
• Packet Marking: 802.1p/Q VLAN tagging, DiffServ, TOS
• Standalone Survivability: Maintains local calls in the event of WAN failure. Outbound calls can use PSTN fallback (including E911).
• Voice Monitoring and Enhancement: Transrating, RTCP-XR, Acoustic echo cancellation, replacing voice profile due to impairment detection, fixed and dynamic voice gain control, packet loss concealment, dynamic programmable jitter buffer, silence suppression/comfort, noise generation, RTP redundancy, broken connection detection
• Direct Media: Hair-pinning (no media anchoring) of local calls to avoid unnecessary media delays and bandwidth consumption
• High Availability: SBC high availability with two-box redundancy, active calls preserved
• Test Agent: Ability to remotely verify connectivity, voice quality and SIP message flow between SIP UAs

SIP Routing

• Routing Criteria Incoming SIP trunk, DID ranges, host names, any SIP headers, codecs, QoE, bandwidth
• Querying External Databases Routing based on customised queries of ENUM, LDAP, HTTP server (REST API)
• Route To: Configured SIP peers, registered users, IP address, request URI
• Advanced Routing Features Alternative routes, load balancing, least-cost routing, call forking, E911 emergency call detection and prioritisation
• SIPREC IETF standard SIP recording interface

Management

• OAM&P: Browser-based GUI, CLI, SNMP, INI Configuration file, REST API, EMS

Physical/Environmental

• Dimensions: 1U x 320mm x 345mm (HxWxD)
• Weight: Approx. 5.95lb (2.7kg) loaded with OSN
• Mounting: Desktop or 19” rack mount
• Operating Temperature: 5°-40° C
• Power: Internal AC power supply rated: 100-240V 4A 50- 60 Hz

OSN Server Platform (Optional)

• Single Chassis Integration: Optional embedded, x86, Intel-based Open Solution Network platform for third-party applications