7700 MultiFrame Manual
7700FC VistaLINK® Frame Controller
Revision 1.4.7 7700FC-5
cable into the RJ-45 receptacle of the 7700FC and the other end into a port of the supporting hub. When
connecting a 7700FC directly to the Ethernet port on a computer you will have to use a “crossover” cable
as shown in Figure 5.
The straight-through RJ-45 cable can be purchased or can be constructed using the pinout information in
Table 1. A colour code wiring table is provided in Table 1 for the current RJ 45 standards (AT&T 258A or
EIA/TIA 258B colour coding shown). Also refer to the notes following the table for additional wiring guide
information.
Pin # Signal EIA/TIA 568A AT&T 258A or
EIA/TIA 568B 10BaseT
or 100BaseT
1 Transmit + White/Green White/Orange X
2 Transmit – Green/White or White Orange/White or Orange X
3 Receive + White/Orange White/Green X
4 N/A Blue/White or Blue Blue/White or Blue Not used (required)
5 N/A White/Blue White/Blue Not used (required)
6 Receive – Orange/White or Orange Green/White or Green X
7 N/A White/Brown White/Brown Not used (required)
Pin
1
8 N/A Brown/White or Brown Brown/White or Brown Not used (required)
Table 1: Standard RJ45 Wiring Colour Codes for “Straight Through” Cables
Note the following cabling information for this wiring guide:
• Only two pairs of wires are used in the 8-pin RJ 45 connector to carry Ethernet signals.
• Even though pins 4, 5, 7 and 8 are not used, it is mandatory that they be present in the cable.
• 10BaseT and 100BaseT use the same pins, a crossover cable made for one will also work with the
other.
• Pairs may be solid colours and not have a stripe.
• Category 5 cable must use Category 5 rated connectors.
The maximum cable run between the 7700FC and the supporting hub is 300 ft (100 m). The maximum
combined cable run between any two end points (i.e. 7700FC and PC/laptop via network hub) is 675 feet
(205 m).
Devices on the Ethernet network continually monitor the receive data path for activity as a means of
checking that the link is working correctly. When the network is idle, the devices also send a link test
signal to one another to verify link integrity. The 7700FC rear panel is fitted with two LEDs to monitor the
Ethernet connection.
10/100 This Amber LED is ON when a 100Base-TX link is last detected. The LED is OFF
when a 10Base-T link is last detected (the LINK LED is ON). Upon power-up the
LED is OFF as the last detected rate is not known and therefore defaults to the
10Base-T state until rate detection is completed.
LN/ACT This dual purpose Green LED indicates that the 7700FC has established a valid
linkage to its hub, whether the 7700FC is sending or receiving data. This LED will
be ON when the 7700FC has established a good link to its supporting hub. This
gives you a good indication that the segment is wired correctly. The LED will BLINK
when the 7700FC is sending or receiving data. The LED will be OFF if there is no
valid connection.
If you are building a “crossover” cable you must wire it according to Figure 5:
