RAD Data comm Vmux-210 Specifications Page 167

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Installation and Operation Manual Chapter 6 Troubleshooting and Diagnostics
Vmux-210 Ver. 1.1 Frequently Asked Questions 6-25
Table 6-12. Vmux File Transfers
Vmux-2100 Vmux-110 Vmux-210 Direction Purpose Remarks
cnfg.dat cnfg110.dat Cnfg210.dat From/To Vmux
Upload/Download
configuration
database
Requires DB
UPDATE after file
transfer.
vmux.img vmux110.img Vmux210.img To Vmux Update software
version
Requires reset (or
power cycle) after
file transfer.
stat.dat N/A N/A From Vmux E1/T1/Serial main
link BW
statistics
(constantly
collected, saves 4
past days)
Statistics file can
be displayed by
VmuxStat.exe
application.
Q: What UDP ports are used by Vmux-2100/110/210?
A: The value of the UDP ports in Vmux traffic are determined as follows:
1. DESTINATION Port: always 0x085E (=2142d)
2. SOURCE Port: composed of a combination of 3 bits (MSB) that depend on
the Vmux model, and 13 bits (LSB) that reflect the destination bundle
number.
Vmux-110: 001 (=1d) + Destination Bundle Number
Vmux-2100: 110 (=6d) + Destination Bundle Number
NOTE: Unlike IPmux - once set, the value of the source port does not change
according to the bundle state.
Example:
Vmux-110/Bundle 1 opposite Vmux-2100/Bundle 3
In this case the UDP Source Port will be set as follows:
Packets transmitted from the Vmux-110 (Dest. Bundle=3):
0010000000000011 = 8195d = 0x2003
Packets transmitted from the Vmux-2100 (Dest. Bundle=1):
1100000000000001 = 49153d = 0xC001
Q: Which is more tolerant of network packet loss, TDMoIP or VoIP?
A: With VoIP, each IP packet holds voice samples from a single call, whereas
TDMoIP bundles voice samples from multiple calls into larger packets. It would
seem, therefore, that packet loss in the network would reduce voice quality
with TDMoIP more than VoIP.
However, it appears that the truth is quite the contrary: TDMoIP will typically
provide higher quality, lower latency voice and much better bandwidth
efficiency than VoIP. The reasons are threefold:
1. Packetization delay is smaller with TDMoIP, so the effect of losing a packet
is much less noticeable to the users.
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