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NTU-2V, NTU-RG Optical Network Terminals  9 
 
2.4 Key Specifications 
Table 2 lists key specifications of the terminals. 
Table 2 – Key Specifications 
VoIP Protocols 
G.729, annex A 
G.711(A/µ) 
G.723.1 (5.3 Kbps) 
Fax transmission: G.711, T.38 
Parameters of Ethernet LAN Interface 
Autodetection, 10/100/1000 Mbps,  
duplex/half-duplex 
IEEE 802.3i 10Base-T Ethernet 
IEEE 802.3u 100Base-TX Fast Ethernet 
IEEE 802.3ab 1000Base-T Gigabit Ethernet 
IEEE 802.3x Flow Control 
IEEE 802.3 NWay auto-negotiation  
Parameters of WAN Interface 
ITU-T G.984.x Gigabit-capable passive optical networks 
(GPON) 
ITU-T G.988 ONU management and control interface (OMCI) 
specification  
IEEE 802.1Q Tagged VLAN  
IEEE 802.1p Priority Queues  
IEEE 802.1D Spanning Tree Protocol 
SC/APC 
according to ITU-T G.984.2 
fibre optical cable SMF-9/125, G.652 
Maximum range of coverage 
Upstream connection speed 
Optical spectrum width (RMS)  
Downstream connection speed