Specifications

Copyright © AMETEK
24
24. Ethernet Switch (6NE) Module
24.1 Description
The 6NE module allows connection of any IEEE
802.3 10/100 Ethernet compliant device to any
FOCUS chassis extending the Local Area
Network (LAN) via the FOCUS system. A single
6NE module allows the user to route to two inde-
pendent T1/E1 interface links, allowing a true
add/drop using just one 6NE. Ethernet switching
functions ensure that data will be transmitted to
the corresponding remote devices only, reducing
unnecessary traffic through the T1/E1 link.
The 6NE fractional T1/E1 module features:
•Two Independent T1/E1 interface Ports
•Two external IEEE 802.3 10/100 interface
ports (part of internal unmanaged ethernet
switch)
•Two High performance RISK processors
with up to 2 Mb buffer memory (each)
•Each external port works at 10 Mbps or 100
Mbps, full duplex or half duplex (auto-
negotiation)
•High performance lookup engine with
support for up to 1024 MAC address
entries with automatic learning and aging.
• 500,000 bit frame buffer in the Ethernet
switch
• Port based VLAN Support
• Support for 802.1p priority queuing,
802.3x flow control, and Quality of Service
(QoS)
• Auto MDI/MDIX crossover (10/100
compatible devices only)
•Ethernet to HDLC protocol conversion
• T1/E1 Serial rate from 64K to 768K Drop
and Insert Channel each (n=1-12)
24.2 Packet Switching
The 6NE module receives incoming packets from
the Ethernet interface, searches its local address
table for the destination MAC address and then
forwards the packet to the appropriate port. If the
destination address is not found, it will treat the
packet as a broadcast packet and send it to all
ports. The 6NE module automatically learns the
MAC address of each port by looking at the in-
coming traffic. The 6NE module also supports
IEEE 802.1Q priority queuing based in the
priority tag. This priority is set according to the
packet tag. When the incoming traffic is destined
to a remote location, the 6NE module executes a
protocol conversion from 802.3 Ethernet to
HDLC protocol for T1/E1 transmission. At the
remote location, the 6NE module rebuilds the
802.3 Ethernet packet from the received HDLC
frame and forwards it to the appropriate port.
24.3 Network Connection
The 6NE module features auto MDI/MDIX
crossover for IEEE 802.3 10/100 compatible
devices, it can be connected directly to another
Ethernet switch or to a PC using standard Ethernet
CAT5 cable (no crossover cable required).
To verify the LAN connection, monitor the Link
Integrity LEDs at both the 6NE module and at the
external device. Proper connections will result in
the LINK LED to turn “green”. When auto nego-
tiation fails, the Link Integrity LED will be Off.
NOTE
Do not connect the two provided 6NE
ethernet ports to a single external
ethernet switch or router.