V-Tap ISDN BRI Manual EN v2.6 Dec 2018 © 2017-2018 Vidicode 25
SD Interface Speed in MHz
This value must be changed only when there are problems with an
SD card. The default is good for most of the cards on the market.
Valid speeds to enter: 1 till 12 , 15 , 17 , 20 , 24 , 30 , 40 and 60.
3.3.11
Special network settings
Max Data Length in Packets
This sets the maximum length of the data portion inside all
communicated packets, including those from the Tunnel function,
web interface and FTP.
The length excludes the Ethernet, IP and TCP headers, which are 54
bytes together. The maximum length of any packet on the network
can be 1514 bytes, so that leaves max 1460 bytes for the data part.
The default length is based on optimal performance when sending
data from an SD card.
There is probably no need to ever change this parameter when the
Tunnel is sending on a normal LAN. When sending directly on a WAN
or very busy LAN, the length might be decreased for better
performance (try 512).
LAN Service Timer
The default value is for normal network speed. When a lot of V-Tap
units are sending to the same Tunnel server, it might be better to
lower the speed to prevent an overload of streams.
The values 65 and 1 can be used for slow and slower sending.
The values 18 and 50 can be used for fast and faster sending.
MAC Address
The Media Access Control (MAC) address of the device is a unique
identifier to communicate over an Ethernet network. The address
cannot be changed.
