Generic Tributary Psu/Ltu Cards; Line And Tributary Traffic And Comms Units - Ericsson Marconi OMS 1200 Product Description

The OMS 1260 product core SE includes a single Power/LCT LTU fitted in slot S3_21.
A second Power/LCT LTU can be ordered as an option: this is installed in Slot S3_20
to provide a protected power supply configuration. Slot S3_21 must always be
equipped in every OMS 1260 subrack.
The card in slot S3_21 can be replaced without power loss to the system if a
protection Power/LCT LTU is fitted in Slot S3_20 and has power connected, and vice
versa. When the card in slot S3_21 is replaced the CCU will adopt the new system
serial number contained on the replacement card.
2.4.2

Generic Tributary PSU/LTU Cards

As described in Section 2.4 above, the Generic Tributary Power LTU for OMS 1200
takes power from the station battery supplies distributed via the backplane, and
employs DC-DC converters to produce low voltage power (+5V, -5V, +12V) which is
then distributed via the backplane to its associated generic tributary slot. This card
type is used with Generic Tributary cards that have front-panel access to interface
cables.
There are two versions of this card:
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Other variants of this type of card are available that provide, in addition to low-voltage
power, LTU traffic port access for 3x34M, 3x45M and 1x140M PDH or 2xSTM-1e
Generic Tributary cards.
2.5

Line and Tributary Traffic and Comms Units

Note:
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•
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221 02-ZAP 701 25/1 Rev C 2006-08-04
03PHB00004AAV-CUA
Generic Tributary Power LTU Version 1 - 1HAM61218AAM. This card is now
obsolete, but may be found in early installed OMS 1200 subracks.
Generic Tributary Power LTU Version 2 - 1HAM61232AAE. This is an
enhanced card having higher maximum load capability. It is used with all
new installations of front-access Generic Tributary cards, and is the only
card capable of providing sufficient power for the ETO-100 and Layer 2 Data
cards.
The OMS 1260 version of the sub-rack will only support the following STM-
1/4 tributary cards.
Four port STM-1/4 multirate card (with SFP modules).
Two port fixed STM-1 electrical interface (required for STM-1 operation with
card protection).
STM-4 VC-4 C/V contiguous to virtual concatenation conversion tributary.
Marconi OMS 1200
Technical Product Description
© Ericsson AB 2006
Commercial in confidence
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