Allied Telesis ADSL2/2+ Annex B based intelligent Multiservice Gateway, G.711, G.726, G.729, 32 MB, PPPoE, PPPoA, IPoA, IP, VoIP: H.323 3.0, SIP 2.0, MGCP/NCS 1.0, IEEE 802.1p Allied Telesis ADSL2/2+ Annex B based intelligent Multiservice Gateway. Voice codecs: G.711, G.726, G.729. Internal memory: 32 MB. Supported network protocols: PPPoE, PPPoA, IPoA, Routing protocols: IP, Supported protocols: VoIP: H.323 3.0, SIP 2.0, MGCP/NCS 1.0. Networking standards: IEEE 802.1p, VPN support: IPSec/VPN. Authentication method: PAP/CHAP