7780MD Series
DVB-S/S2/S2X L-Band and IF Satellite Modulators
Page - 4
Revision 1.0
ASI IN <1-2>:
Input DIN connectors.
ASI OUT:
Output DIN connector.
IP CONTROL:
Control port (not in use).
IP DATA:
Data input connector.
2.1.2. Ethernet Connection
The 7780MD Series uses 10Base-T (10 Mbps), 100Base-TX (100 Mbps) or Gigabit (1 Gbps) twisted
pair Ethernet cabling systems. When connecting for 10Base-T systems, category 3, 4, or 5 UTP cable
as well as EIA/TIA – 568 100
Ω STP cable may be used. When connecting for 100Base-TX systems,
category 5 UTP cable is required. The cable must be “straight-through” with an RJ-45 connector at
each end. Establish the network connection by plugging one end of the cable into the RJ-45 receptacle
of the card 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
2-1. A colour coded wiring table is provided in Table
2-1 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
1
Pin
#
Signal
EIA/TIA 568A
AT&T 258A
or
EIA/TIA 568B
10BaseT
or
100BaseT
1000BaseT
1
Tr
White/Green
White/Orange
Used
Used
2
Transmit –
Green/White or White
Orange/White or Orange
Used
Used
3
R
White/Orange
White/Green
Used
Used
4
Bi-dir +
Blue/White or Blue
Blue/White or Blue
--
Used
5
Bi-dir -
White/Blue
White/Blue
--
Used
6
Receive –
Orange/White or Orange
Green/White or Green
Used
Used
7
Bi-dir +
White/Brown
White/Brown
--
Used
8
Bi-dir -
Brown/White or Brown
Brown/White or Brown
--
Used
Table
2-1 : 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 for
10/100BaseT. 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).
•
1000BASE-T requires at least Category 5 cable.
•
1000BASE-T requires all four pairs to be properly connected.
•
Pairs may be solid colors 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 ft
(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
