Model 5601MSC
Model 5601MSC Master SPG/Master Clock System
Page - 58
Revision 2.2
INSTALLATION
3.1.3. Ethernet Connections
The 5601MSC is equipped with two Ethernet ports. They can be used with either 10Base-T (10 Mbps)
or 100Base-TX (100 Mbps) 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 or better UTP cable is required. The cable must be
“straight through” with an 8-pin modular connector at each end. Make the network connection by
plugging one end of the cable into the CONTROL receptacle of the 5601MSC and the other end into an
Ethernet hub or switch. The CONTROL port hosts an NTP server (with periodic broadcasts) and an
SNMP server for remote monitoring and control.
The TIME Ethernet port must be configured to be on a different subnet than the CONTROL port. The
TIME also runs an SNMP service but should be connected to a network that is dedicated only to time
protocol traffic. The NTP server also runs on the TIME network but does not perform broadcasts to
keep traffic at a minimum which is desirable to reduce packet latencies and increase time reference
accuracy. The TIME port hardware is capable of supporting a future implementation of IEEE 1588 PTP.
The straight-through Ethernet cable can be purchased or can be constructed using the pinout
information in Table 3-1. A color code wiring chart is provided in Table 3-1 for the current Ethernet
standards (AT&T 258A or EIA/TIA 258B color 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 100BaseTX
1
Tr
White/Green
White/Orange
X
2
Transmit –
Green
Orange
X
3
R
White/Orange
White/Green
X
4
N/A
Blue
Blue
Not used (required)
5
N/A
White/Blue
White/Blue
Not used (required)
6
Receive –
Orange
Green
X
7
N/A
White/Brown
White/Brown
Not used (required)
8
N/A
Brown
Brown
Not used (required)
Table 3-1: Standard 8-pin Modular Connector Wiring Color Codes
Note the following cabling information for this wiring guide:
•
Only two pairs of wires are used in the 8-pin modular 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 100BaseTX use the same pins; the same crossover cable will work with both.
•
Pairs may be solid colors and may not have a stripe.
•
Category 5 cable must use Category 5 rated connectors.
The maximum cable run between the 5601MSC and the supporting hub or switch is 300 ft (90 m). The
maximum combined cable run between any two end points (i.e. 5601MSC 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 5601MSC rear panel is fitted with two LEDs to monitor
the Ethernet connection.
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Содержание 5601MSC
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