Analog Extensions from ELU34/1 to ELU34/7

ELU34 series is a 32 individuals analog extension line unit intended for normal analog telephones, with functionality for both message waiting and call metering. A parallel telephone, an extra bell or a FAX can be connected to an ELU34 series.

Note:

ELU34 series has to have individual 0 activated as the first individual and removed as the last individual, or else the communications with the board will fail.

Note:

If done in the wrong order individuals will be blocked.

Note:

An external primary protection circuit shall be used as an additional protection when outdoor lines from other buildings are connected to the board. This protection circuit must have a striking voltage higher than 280 VDC.

Note:

A remaining high voltage may remain on the board when the board is removed from the subrack with the power still on, a so called “hotswap”. Do not touch the board component or solder points for a few minutes after the removal. To reduce the high voltage to a safe level, leave the board un-plugged in the subrack for at least 15 seconds.

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