Max. Signaling/Media Sessions    60    
Max. SRTP/RTP Sessions    60                                        
Max. Registered Users    200                            
                                        
Telephony Interfaces                                                                            
Analog    Up to 4 FXS ports                            
1-4 BRI ports, network S/T interfaces , NT or TE termination            
Digital                
Clock source    5 ppm High Precision                            
Network Interfaces                                    
Ethernet 4GE interfaces configured in 1+1 redundancy or as individual ports            
                                        
Security                                    
                                
Access Control        
DoS/DDoS line rate protection
bandwidth throttling
dynamic blacklisting            
                            
VoIP Firewall        
RTP pinhole management 
rogue RTP detection and prevention
SIP message policy 
advanced RTP latching
Encryption/Authentication        
TLS, 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 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            
Registration and Authentication        
User registration restriction control
registration and authentication on behalf of users
SIP authentication server for SBC users
Transport Mediation SIP over UDP/TCP/TLS, IPv4/IPv6, RTP/SRTP (SDES)            
Message Manipulation Ability to add/modify/delete SIP headers and message body using advanced regular expressions (regex)
URI and Number Manipulations URI user and host name manipulations, ingress and egress digit manipulation            
                            
Vocoders Coder normalization including coder enforcement and re-prioritization, extensive vocoder support: G.711, G.723.1, G.726, G.729,
GSM-FR, AMR-NB, AMR-/WB (G722.2), SILK-NB/WB, Opus-NB/WB            
                            
Signal Conversion DTMF/RFC 2833/SIP, T.38 fax, packet-time conversion            
NAT Local and far-end NAT traversal for support of remote workers            
Voice Quality and SLA                                    
Call Admission Control    Based on bandwidth, session establishment rate, number of connections/registrations            
Packet marking    802.1p/Q VLAN tagging, DiffServ, TOS                            
Standalone Survivability Maintains local calls in the event of WAN failure                            
Impairment Mitigation    Packet Loss Concealment, Dynamic Programmable Jitter Buffer, Silence Suppression/Comfort, Noise Generation,
RTP redundancy, broken connection detection                            
                                    
Voice Enhancement    Transrating, RTCP-XR, Acoustic echo cancellation, replacing voice profile due to impairment detection, Fixed & dynamic voice gain control
                                    
Direct Media (No Media Anchoring)    Hair-pinning of local calls to avoid unnecessary media delays and bandwidth consumption
                                        
Voice Quality Monitoring    RTCP-XR                            
                                    
Quality of Experience    Access control and media quality enhancements based on QoE and bandwidth utilization
                                    
Test agent    Ability to remotely verify connectivity, voice quality and SIP message flow between SIP UAs
SIP Routing                                    
Routing Methods    Request URL, IP address, FQDN, ENUM, advanced LDAP, third-party routing control through REST API
                                    
Advanced Routing Criteria    QoE, bandwidth, SIP message (SIP request, coder type, etc.), Layer-3 parameters            
                                    
Routing Features    Least-cost routing, call forking, load balancing, E911 gateway support, emergency call detection and prioritization
                                        
SIPRec    IETF standard SIP recording interface                            
                                        
Management                                    
OAM&P    Browser-based GUI, CLI, SNMP, INI Configuration file, REST API, EMS            
Physical / Environmental                                    
Dimensions    51 x 296 x 160 mm (2 x 11.65 x 6.3 in.) (HxWxD)                            
                                        
Weight    670 g                            
                                    
Power    Single universal AC power suppy 100-240V, 50-60 Hz, 12V/3A or 12V/5A            
                                        
Mounting    Desktop                            
            
Environmental    Operational: 5 to 40 °C (41 to 104 °F); Storage: -25 to 85 °C (-13 to 185 °F) Relative Humidity: 10 to 90% non-condensing