Specifications Capacities Max. Signaling 60 Max. RTP/SRTP Sessions 60 Max. Registered Users 200 Telephony Interfaces Digital 1-4 BRI ports, network S/T interfaces, NT or TE termination Analog Up to 4 FXS and 4 FXO ports Network Interfaces Ethernet 4 GE 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, 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 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, IPv4/IPv6, RTP/SRTP (SDES) 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 SIP Interworking 3xx redirect, REFER, PRACK, session timer, early media, call hold, delayed offer Signal Conversion DTMF/RFC 2833/SIP, T.38 fax, T.38 V3, packet-time conversion NAT Local and far-end NAT traversal for support of remote workers AudioCodes Session Border Controllers DATASHEET Mediant™ 500L 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 Voice