VDSL2 Interface Overview
Very-high-bit-rate digital subscriber line (VDSL) technology is part of the xDSL family of modem technologies, which provide faster data transmission over a single flat untwisted or twisted pair of copper wires. Table 1 specifies the key details of the VDSL2 interface.
Table 1: VDSL2 Interface Details
For information about platforms support, see hardware compatibility tool (HCT).
For information on VDSL2 hardware specifications, see 1-Port VDSL2 Annex A Mini-Physical Interface Module (SRX-MP-1VDSL2-R).
Features Supported on the VDSL2 Interface
Table 2 describes the key features supported on VDSL2 interface.
Table 2: Key Features Supported on VDSL2
Packet Transfer Mode (PTM)
Discrete multitone (DMT) modulation
For more information on supported features and profiles on VDSL2 interfaces, see1-Port VDSL2 Annex A Mini-Physical Interface Module (SRX-MP-1VDSL2-R).
VDSL2 Network Deployment Topology
The VDSL2 interface uses either Gigabit Ethernet or fiber as second mile to connect to the Broadband Remote Access Server (B-RAS). Figure 1 shows a typical VDSL2 network topology.
The ADSL interface uses either Gigabit Ethernet or OC3/DS3 ATM as the second mile to connect to the B-RAS. Figure 2 shows a backward-compatible ADSL topology using ATM DSLAM.