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4. Update Firmware
4.1 Firmware version
In order for VDSL local and remote converters to
communicate, both remote and local ends must set to the
same communication speed. If speeds are different then
remote and local modems will not link. The factory default
firmware (R2) of VC-101M/S supports symmetric 11Mbps
data rate. The data rate can be increase to 15Mbps
downstream and 17Mbps upstream in trade off shorter
distance by update the firmware to R4 version. PLANET also
provides a R4.5 firmware for VC-101S to work with VC-412
and Cisco’s LRE switch. The following table lists the
feature of R2, R4 and R4.5 firmware.
Upstream (Mbps) Downstream(Mbps) Firmware
version
Line speed Data rate Line speed Data rate
Maximum
Distance
R2
(default)
12.5 11.38 12.5 11.38 1.2km
R4 18.75 17.06 16.67 15.17 1.05km
R4.5 1.56
6.25
12.5
18.75
1.43
5.69
11.38
17.06
4.17
6.25
12.5
16.67
3.77
5.69
11.38
15.17
1.5km
1.5km
1.2km
1.05km
Note: The distance is based on good cable quality and
connection status. The actual distance can be reduced by
the following factors:
1. The age and type of the wiring.
2. The quality of the cable.
3. Each terminated bridge tap may reduce the distances by
300 feet.
4. If it run over bundled telco cabling, the maximum distance
supported can be approximately 30 percent lower due to
cross talk and interference.
5. The 5/10/15 data rate for R4.5 is only applicable between
VC-101S and VC-412. If connect VC-101M and VC-101S
with R4.5 firmware, the speed is only 4/1 Mbps.