Signaling protocols
- SIP, SIP-T/I
SIP functionality
- SIP L5 NAT/Topology hiding
- SIP dialogue transparency
- SIP RFC-3326 Reason w/Cause
- SIP transit of unrecognized headers1
- B2BUA as defined in RFC-3261
- RFC-2833 (Telephone Event)
- RFC-3264 (Offer/Answer)
- RFC-3204 (MIME Support)
- RFC-4028 (Session Timers)
- RFC-3326 (Reason Field)
- SIP RFC-2833 relay
- RFC-3262 (PRACK)
- RFC-3372 (SIP-T)
- B2BUA peering
- B2BUA access
- RFC-1889 (RTP)
- RFC-4566 (SDP)
- RFC-3261
- RFC-3581
- RFC-3515 (Refer Method)
- RFC-3265 (Subscribe)
Media protocols
- RTP and RTCP
Media modes
- Flow-through
- Flow-around1
Transport protocols
- TCP
- UDP
- TCP/UDP interworking
Network protocols
- LACP
- IPv4
- IPv61
Video codecs
- H.263
- H.263-1998
- H.264
Capacity
- Up to 500 simultaneous calls
Redundancy
- Warm-standby 1+1 redundancy
- Automatic switching to a backup
- Automatic synchronization of primary and backup equipment settings
Security
- Up to 40 VLAN
- VPN (L2TP, PPTP)
- Rogue RTP detection
- Toll-free, fraud protection1
- Protection against DoS – SIP/ICMP flood
- DDoS1
- Protection against overloading, based on registration
- IP address filtering according to geographic criterion
Fax transmission
- T.38
- G.711
Voice codecs
- G.711 (a-law, µ-law), G.729, G.729 (A/B), G.723.1, G.722, G.728, G.726
Quality of Service (QoS)
- IP priority mechanism1
- Differentiated Services Code Point (DSCP) marking1
Interfaces
IP
- 2 x 1000Base-X ports (2 slots for SFP modules)
- 3 x 10/100/1000Base-T (RJ-45) ports
USB port, 2 e-SATA ports
- Alarm logging
- Billing data recording
Statistics of connections
- CDR files are kept on the SATA storage
- CDR files are stored on the remote FTP server
- Transmission of data on connections via AAA protocol1
Management
The following management means provides access right differentiation:
- MML console (SSH/Telnet)
- Web interface
- Monitoring and editing of active registration list
- Possibility of integration with Eltex.EMS (SNMP)
¹ Not supported in the current firmware version 1.8.0
