■ Intel IXP420BD/IXP425BD at 533 MHz
■ 160 Flash
■ 64MB SDRAM
■ Two USB2.0 ports. One connects to external port and the other port is installed in the inside
■ 4 * LAN ports and 1 * WAN port
■ 2 * FXO ports & 2* FXS ports
■ On board DSP chip AC49008
■ Codec support: G.723.1, G.729, G.711 (μ/A-Law), G.726 ADPCM
■ Caller ID : Bellcore and ESTI (On hook and off hook service)
■ Fax support: T.38 compliant
■ Echo canceller: G.168-2002 compliant with programmable echo tail of up to 128ms