914-Hde Ethernet Port; Table 4-5: Ethernet Leds; Table 4-6: Ethernet Latency; Figure 4-7: Ethernet Port - Moog FOCAL 914-HDE L1 User Manual

4.5

914-HDE Ethernet Port

The 914-HDE provides an un-switched, low latency 10/100/1000 BASE-T(X) Ethernet link through the optical port.
The part is default configured for 10/100 BASE-T(X) in the L1 version, and 10/100/1000 BASE-T(X) for M1 and H1
versions. Auto-negotiate settings can be accessed via the Model 914 Diagnostic GUI. A standard 8P8C (RJ45)
modular jack provides the mechanical interface for the Ethernet port. The port is auto MDI/MDIX capable, and
supports jumbo frames up to 9000 bytes.
An optional "Link Fault Pass Through" can be enabled. This feature will disconnect the Ethernet link if the far side
is not linked. Therefore the system must be linked on both sides for the Ethernet link to be established. Enabling or
disabling this feature is done through the diagnostic GUI.
Integrated LEDs show Ethernet Link Status as shown in Table 4-5.
LED Status
Green Yellow
OFF OFF
ON OFF
ON ON
FLASHING OFF
FLASHING ON
End-to-end latency through the multiplexer is a calculation adding a fixed electronic latency to the Ethernet frame
time which is a function of the frame length, and the optical latency which is a function of distance. Adding all three
together gives a total latency figure.
Latency Component / Link Speed
FEL (Fixed Electronic Latency)
FT (Frame Time)
OL (Optical Latency)
Latency = FEL + FT + OL
Focal Technologies Corporation
A Moog Inc. Company
Model 914-X Series Modular Multiplexer System User Manual

Figure 4-7: Ethernet Port

Table 4-5: Ethernet LEDs

Function
No Link
Linked at either 1000 BASE-T or 10 BASE-T
Linked at 100 BASE-TX
Link Activity at either 1000 BASE-T or 10 BASE-T
Link Activity at 100 BASE-TX

Table 4-6: Ethernet Latency

10 Mb/s
30 s
# Bytes * 0.8 s
5 s / km
100 Mb/s 1000 Mb/s
6 s 3 s
# Bytes * 0.08 s # Bytes * 0.008 s
5 s / km 5 s / km
Document Number: 914-0601-00 Rev. 5.0
Page 4-5