Over the years, we have identified some frequently asked questions from our customers. If you have a question about our products, there is a good chance that the answer to your question is here in our FAQ section.
Click on the bar below to choose between questions regarding our industrial Ethernet products or questions regarding our general products.
Q.1 Why does the NWT-707 not run with a 10/100 a hub or switch?
Ans:
Our earlier model of NWT-707 with serial numbers 99xxxx (first produced in 1999) was designed to work purely in 10Mbps networks. Most 10/100 hubs and switches now feature 10/100 auto-sensing functions and has default settings to 100Mbps. When earlier models of NWT-707 are connected to a 10/100 hub or switch with a default setting of 100Mbps, they will not be compatible because of the difference in speed. Solution: our NWT-707 with serial number 00xxxx (first produced in 2000) is a 10Base-T to FL repeater. This is designed to be compatible with any 10/100Mbps hub or switch.
Q.2 Does NGF-760/762 support flow control?
Ans:
NGF-760/762 support flow control functions intelligently according to various conditions.
1. In full duplex mode, if the link partner support flow control, the flow control function of NGF-760/762 is enabled.
2. In full duplex mode, if the link partner does not support flow control, the flow control function of NGF-760/762 is disabled.
3. In half duplex mode, the jam packet will be asserted for backpressure.
Q.3 What are the lowest and the highest working temperatures for VOLKTEK converters?
Ans:
The highest working temperature for VOLKTEK converters is 50°C and the lowest is 0°C.
Q.4 If there is disruption in the primary line, will the NXF-742 detect this error and resume connection via the redundant link?
Ans:
The Link Fault Signaling (LSF) function on the NXF-742 will signal the switch to divert data transmissions via the redundant link until the primary link is repaired. Thereby reducing network downtime to a matter of seconds.
Q.5 The NMF-735 and NXF-742 features Link Fault Signaling (LFS) and Loopback Test (LBK), otherwise they are the same as the NXF-705. Is that correct?
Ans:
The NMF-735 and NXF-742 are enhanced versions of the NXF-705. The NMF-735 is a managed media converter. In addition to LFS and LBK, the NMF-735 is further enhanced with automatic MDI/MDI-X detection and automatic NWAY capabilities.
Q.6 For the NXF-742 configuration, is there a connection between the primary line and the redundant line?
Ans:
The primary line is a separate link using two NXF-742 converters connected to the switches at each end, and the redundant line has the same setup. In total, there are four converters.
Q.7 Loopback test Function: We are facing the following problem during the project: “loss of ping requests to the remote NMF-737SC right after we connect the Ethernet”. At the Central Office, we are using a Cisco 3550 switch as the main switch.
Ans:
One possible solution for the above problem:
Both NMF-735 and NMF-737 actually accept the ping and respond, but they filter ping with tag. This means that if they get a “ping with tag” to NMF-735 or NMF-737 then ping will not reply (it looks like ping loss), but it will not affect the data frames received from one side and passing to the other side.
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