Red Lion IndustrialPr 6000 Router - Manual (Page 46)

Software User Guide 46
Network Tab
0 ‐ Default:
Band Group 0 ‐ G900 G1800 W2100 W800
Band Group 1 ‐ G1900 G850 W1900 W850
1 ‐ Europe/Rest of the World:
Band Group 0 ‐ G900 G1800 W2100 W800
Band Group 1 ‐ G1900 G850 W1900 W850
2 ‐ North America:
Band Group 0 ‐ G1900 G850 W1900 W850
Band Group 1 ‐ G900 G1800 W2100 W800
3 ‐ Australia:
Band Group 0 ‐ G900 G1800 W850 W2100 W800
Band Group 1 ‐ G1900 G850 W1900
4‐ Japan:
Band Group 0 ‐ G900 G1800 W2100 W800
Band Group 1 ‐ G1900 G850 W1900 W850
Select Cellular Network Speed: Select the connection speed to be used for the cellular modem connection from the
drop down list provided. Possible values include: Auto, High and Low. The recommended setting for this field is Auto.
Cellular MTU: Enter the MTU size you desire to use. In computer networking, the maximum transmission unit (MTU)
of a communications protocol of a layer is the size (in bytes) of the largest protocol data unit that the layer can pass
onwards. MTU parameters usually appear in association with a communications interface (NIC, serial port, etc.). Stan‐
dards (Ethernet, for example) can fix the size of an MTU; or systems (such as point‐to‐point serial links) may decide
MTU at connect time. A larger MTU brings greater efficiency because each packet carries more user data while proto‐
col overheads, such as headers or underlying per‐packet delays, remain fixed; the resulting higher efficiency means a
slight improvement in bulk protocol throughput. A larger MTU also means processing of fewer packets for the same
amount of data. In some systems, per‐packet‐processing can be a critical performance limitation.
However, this gain is not without some downside. Large packets can occupy a slow link for some time, causing greater
delays to following packets and increasing lag and minimum latency. For example, a 1500‐byte packet, the largest
allowed by Ethernet at the network layer (and hence over most of the Internet), ties up a 14.4k modem for about one
second.
The recommended setting for this field is 1500.
Sync Time: This option will attempt to take the local time as reported by the cellular tower, and set the unit’s system
time to match. The recommended setting for this field is Yes, unless another method of time Sync, such as NTP is
being used.
Choose Connection Behavior: In Persistent mode, the unit will always attempt to maintain a cellular connection with
the carrier’s network. In On‐Demand mode, the connection to the cellular network will only be attempted when pack‐
ets are destined to leave the wireless interface. In addition, after a period of Idle Time, the connection will terminate.
Persistent mode has the potential to use more bandwidth in a limited data plan meant for fallback. For this reason,
On‐Demand is commonly chosen for an environment using an ethernet connection as a primary interface, while IP
Fallback is used to bring up the secondary wireless connection as a backup. Modern cellular connections use idle
states in on‐board radios to often negate the need for an On‐demand option.