coM.sat ISDN Basic UMTS
coM.sat ISDN Basic UMTS
coM.sat ISDN Basic UMTS
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<strong>coM</strong>.<strong>sat</strong> <strong>ISDN</strong> <strong>Basic</strong> <strong>UMTS</strong><br />
then performed after about 100 seconds if no <strong>ISDN</strong> connection could be established.<br />
If the watchdog is switched off, no reset occurs. In both cases the yellow LEDs<br />
indicate the state of the <strong>ISDN</strong> connection. If there is a problem with the physical<br />
connection, the yellow LED associated with channel 1 will be flashing. This indicates<br />
a problem with the connected device, e.g. a wrong cable. If the logical connection<br />
can not be established, the second channel’s yellow LED will be flashing. This<br />
indicates most likely a configuration problem, e.g. a mismatch of point to point and<br />
point to multipoint configuration.<br />
If the optional power supply add-on board is installed, then it is possible to connect<br />
telephones without own power supply directly to the NT port of the <strong>coM</strong>.<strong>sat</strong> <strong>ISDN</strong><br />
<strong>Basic</strong> <strong>UMTS</strong>. The add-on board features a DC/DC voltage converter that generates<br />
the necessary voltage on the NT line. This is the same add-on board that also enables<br />
synchronization from NT port and direct connection of the NT and TE port during power<br />
failure, but it is available with or without power supply.<br />
4.2 <strong>coM</strong>.<strong>sat</strong> <strong>ISDN</strong> <strong>Basic</strong> <strong>UMTS</strong> in TE mode<br />
If a <strong>coM</strong>.<strong>sat</strong> <strong>ISDN</strong> <strong>Basic</strong> <strong>UMTS</strong> TA is to be operated in TE mode, the following<br />
connection schematic results. This can vary depending on the TC system used,<br />
although the principle arrangement is retained. In TE mode, the <strong>coM</strong>.<strong>sat</strong> <strong>ISDN</strong> <strong>Basic</strong><br />
<strong>UMTS</strong> is installed as an internal extension (TE), i.e. it is operated at the internal S0<br />
bus and behaves like a standard <strong>ISDN</strong> device. In this case, no synchroni<strong>sat</strong>ion via<br />
the basic link is necessary.<br />
created: page: file:<br />
11/04/07 74 <strong>coM</strong><strong>sat</strong> <strong>ISDN</strong> <strong>Basic</strong> Manual <strong>UMTS</strong>.doc<br />
Note Protection Mark according to DIN 34!
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