user manual
Overview
18
AT-MC606 Port Descriptions
VDSL Line Port The VDSL Line port features a BNC coaxial connector. It allows you to 
connect two AT-MC606 VDSL Network Extender units together using an 
existing internal building coaxial cable. One AT-MC606 VDSL Network 
Extender is configured as a Provider unit and the other as a Subscriber 
unit.
10Base-T/
100Base-Tx
Ethernet Port
The AT-MC606 VDSL Network Extender has one 10Base-T/100Base-Tx 
Ethernet port which allows you to connect one AT-MC606 configured as a 
Subscriber unit to an Ethernet device and a second AT-MC606 configured 
as a Provider unit to an Ethernet Local Area Network (LAN) in the building 
equipment room. This twisted pair port features an RJ-45 connector with a 
maximum operating distance of 100 meters (328 feet). For the port pinout 
details, refer to “RJ-45 Port Pinouts” on page 20.
Type of Cabling 
The 10Base-T/100Base-TX Ethernet port is designed to operate with 
unshielded twisted pair cables. For 10 Mbps operation, Category 3 or 
better 100 ohm unshielded twisted pair cabling is required. For 100 Mbps 
operation, Category 5 and Enhanced Category 5 (5E) 100 ohm unshielded 
twisted pair cabling is recommended. 
Auto MDI/MDI-X
A 10Base-T/100Base-TX Ethernet port on a network device can have one 
of two possible wiring configurations: MDI or MDI-X. The Ethernet port on 
a PC, router, or bridge is typically wired as MDI, while the twisted pair port 
on a switch or hub is usually MDI-X.
The AT-MC606 Ethernet port features automatic MDI/MDI-X. The port 
automatically determines the configuration of its end-node and then 
configures itself appropriately. For example, if the AT-MC606 Ethernet 
port is connected to a port on a bridge, which is typically wired as MDI, the 
AT-MC606 VDSL Network Extender automatically configures the Ethernet 
port to MDI-X. This feature allows you to use either straight-through or 
crossover cables when connecting the AT-MC606 to other Ethernet 
devices. 
Auto-Negotiation
The AT-MC606 VDSL Network Extender auto-negotiates the speed and 
duplex mode of the Ethernet link, so that the link comes up in the highest 
performance configuration supported by both ends. For example, if an end 
node is capable of only 10 Mbps, the AT-MC606 VDSL Network Extender 
sets its Ethernet port to 10 Mbps or if an end node is capable of 100 Mbps, 










