Communication Technology

Protocol supported	STP, IP, ICMP, TCP, UDP, ARP, FTP, TFTP, DNS, HTTP, SNMP, MIB II, NAT, PAT, DHCP, VLAN (802.1q), PPPoE, SIP
Functional	Router / Bridge mode, IP-Filtering, Smart Ethernet Switch , 24 Line PABX, SIP v2.0 Gateway
Connections	6 10/100Base-TX 2 100Base-FX, 32 FXO/FXS (optional), 1 E1 (R1.5, EDSS) (optional)
Managment	WEB, SNMP, SNMP Trap
Speech coding	G.711, ACELP 4,8, G.729ab
Statistics	By every Ethernet Port. Calls of PABX and SIP gateway.
Dimensions	380x260x105 (19″ rack 1U) ~7Kg
Power supply	110/220V ~50Hz

Implementation of STP protocol
Collection of statistics (onsent/received Ethernet frames) via each port and its transmission to external equipment
Control the status of Ethernet connections and automaticaly send the SNMP message on connection / disconnection to external equipment
Control of parameters via SNMP (version 2) protocol: configuration and state of ports, port priority command on/off, establishment of priority levels via ToS, port based VLAN mode on/off, input and output flow rate of each port.

Filtration of IP packets via SNMP (version 2) protocol to the complete criteria set
Translation of network addresses according to the NAT (network address translation) and PAT (port address translation) technology
Support of traffic priorities: via ToS fields, via IP-address of receiver and sender
Support of dynamic routing
Collection and transmission of statistics via IP, TCP, UDP, ICMP protocols and IP-network usersџ Control of parameters via assigned interfaces: filtering, network address translation, priorities and other functions.

Establishment of connections between internal FXS users
Establishment of connections via SIP protocol
Support of modes of proxy server and SIP customer
Connection of payphones via FXS interface and provision of connection with payphone management center via IP channel
Simultaneous implementation of up to 12 connections with 8 Kbit/s codec, 4.8 Kbit/s ACELP to operate on low-speed IP-channel
Control of equipment parameters and line features, user rights, SIP protocol settings, speech coding mode via SNMP (version 2) protocol.

Transformation of speech and service information, received from PBX in terms of bit transfer rate, into IPflow and reverse transformation from IP-flow into bit transfer rate
Support of protocols of telephone signaling: R 1.5 and EDSS1
Support of protocol of SIP 2.0 IPtelephony network signaling
Two-way conversion of telephone signaling into IP-telephony network signaling
Coding of speech in synchronic mode according to the G.711 recommendation
Coding of speech in packet mode according to the G.711, ACELP 4.8, G.729ab recommendation

Network and VoIP office gateway IP-M