Siemens Up0 line extender
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CONNECTIONS
The first extender operates at PBX site and is being powered directly from Up0 line.
The second extender operates at system telephone site. Together with the telephone – it needs to be
powered by an external power supply dedicated for system phones (i.e. Salcomp C39280-Z4-C510).
The power is being supplied on the second pair in a wire. The extender adds it to the digital signal on
the first pair in wire and puts it back to the telephone via the power supply. This allows to connect the TDM
telephone with a single pair wire and it will work.
CAUTION: A short on a pair of wire to the phone will cause the malfunction of the extender.
START UP
If all connections are correct, pair of extenders will try to connect to each other. This can take up to
several seconds, especially in cases of long wire length in between them or/and in harsh industrial conditions.
After the link between expanders is established, they work in a transparent manner from the audio
signal point of view. Audio signal is retransmitted bit-perfectly. There is an option to encrypt audio data. For
the signalling data additional features were developed to protect it from corruption and to ensure its delivery
to the other side of the link.
Up0 extenders maintain the sync in between PBX and the TDM telephone. All the clocks are locally
synchronised with DPLL.
In operation, all LEDs shall glow in green colour. Short and spontaneous blinking of theirs means
unusually big phase correction for internal DPLL circuits and shall not cause concerns about device operation.
FIRMWARE UPGRADE
Firmware upgrade procedure:
- turn the extender off,
- prepare uSD card with FAT32 filesystem in it,
- put firmware file in the root folder of the card, make sure it is called
upgrade.upg
.
- put the card into the extender and power it up,
The device shall update its firmware automatically, and start standard operation after a few seconds.
Upgrade
file will be deleted if the upgrade process was successful.
