
7700 MultiFrame Manual
7700R16x16 SD/HD/3G Modular Router
Page - 6 Revision 1.0
2.5. ETHERNET CONNECTIONS
ETHERNET: There is one RJ-45 network connector on the rear panel. The RJ-45 connector is
an Ethernet port used for monitoring and control of the system, etc. See section
4.2.1 for information on connecting to an Ethernet network. See section 4.1.2 for
information on configuring the network address for the router.
2.5.1. Connecting to an Ethernet Network
The 7700R16X16 Series uses 10Base-T (10 Mbps), 100Base-TX (100 Mbps) or Gigabit (1Gbps)
twisted pair Ethernet cabling systems. When connecting for 10Base-T systems, category 3, 4, or 5
UTP cable as well as EIA/TIA – 568 100ΩSTP cable may be used. When connecting for 100Base-TX
systems, category 5 UTP cable is required. The cable must be “straight-through” with a RJ-45
connector at each end. Establish the network connection by plugging one end of the cable into the RJ-
45 receptacle of the 7700R16X16 Series and the other end into a port of the supporting hub.
The straight-through RJ-45 cable can be purchased or can be constructed using the pin-out information
in Table 2-3. A colour coded wiring table is provided in Table 2-3 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 2-3: Standard RJ-45 Wiring Colour Codes
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 router and the supporting hub is 300 ft (90 m). The maximum
combined cable run between any two end points (i.e. router 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.