MSBR Series 37 Mediant 500 MSBR
Hardware Installation Manual 5. Cabling the Device
5.2.3 ADSL/2+ and VDSL2 WAN Cabling
The ADSL/2+ and VDSL2 (xDSL) WAN port provides a single xDSL interface through an
RJ-11 port.
Warning:
• The device does not include primary telecom protection! When the DSL telephone
lines are routed outside the building, additional protection - usually a 350V three-
electrode Gas Discharge Tube (GDT) as described in ITU-T K.44 - must be provided
at the entry point of the telecom wires into the building (usually on the main
distribution frame / MDF), in conjunction with proper grounding. The center pin of the
GDT (MDF grounding bar) must be connected to the equipotential grounding bus bar
of the Telecommunication room.
• To protect against electrical shock and fire, use a minimum 26-AWG wire to the
connect DSL port to the network.
Note: A/VDSL interface is a customer ordered item.
The specifications of the xDSL interface include the following:
ADSL/2+:
• RFC 2684 in Routed (IPoA) and Bridged (ETHoA) modes, supporting LLC-SNAP
and VC-Multiplexed encapsulations over AAL5
• ATM UNI 4.1 compliant
• UBR, CBR, VBR classes of service
• RFC 2364 PPPoA
• RFC 2516 PPPoE over ATM
• Up to 8 PVCs
VDSL2:
• ITU G.991.2 Annex E for Ethernet, also known as EFM or 2Base-TL, as defined in
IEEE 802.3ah
• 802.1q VLANs over EFM
• PPPoE
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