Nortel Networks NTRN10AN, 3500 manual DS3VTx12 mapper NTN435FA

3-90Hardware feature descriptions

The maximum number of working DS3x12 / DS3x12e mappers that can be inserted in a shelf is four.

See Table 3-3 on page 3-6for operational temperature ranges.

Note 1: Mixing a DS3x12 mapper with a DS3x12e mapper as a protected pair will result in the protected pair to behave as 2 DS3x12 circuit packs. Additional path PMs and alarms supported with the DS3x12e are not available when circuit packs mixed.

Note 2: If there is a 1-28 DS1 I/O module installed, and if slots 5 and 6 are not equipped with DS1 mappers, you may not install DS3x12 or DS3x12e circuit packs in slots 5 or 6 (there is not enough room for slot 5 or slot 6’s BNC I/O modules).

Note 3: If there is a 29-56 DS1 I/O module installed, and if slots 7 and 8 are not equipped with DS1 mappers, you may not install DS3x12 or DS3x12e circuit packs in slots 7 and 8 (there is not enough room for slot 7 or slot 8’s BNC I/O modules).

Note 4: If there is a 29-84 DS1 I/O module installed, and if slots 7 through 10 are not equipped with DS1 mappers, you may not install DS3x12 or DS3x12e circuit packs in slots 7 through 10 (there is not enough room for slot 7 through slot 10’s BNC I/O modules).

Alarm LED definitions

The following table provides a list of the DS3x12 / DS3x12e mapper LEDs. See Figure 3-28 on page 3-47for the DS3x12 and DS3x12e mapper faceplate layout showing the location of the LEDs.

LED	Color	Description
Status	Red	Circuit pack failure
Active	Green	DS3x12 equipment is active and at least one DS3
		line facility is in service with at least one
		cross-connect
LOS (1-12)	Yellow	Loss of signal on the port

DS3VTx12 mapper (NTN435FA)

Each of the 12 ports of the DS3VTx12 mapper receives a channelized DS3 signal and demultiplexes it into 28 DS1s. The DS1s are mapped into VT1.5s and carried off the circuit pack to the VTX-series circuit packs where they are cross-connected into any of the supported transport or tributary circuit packs. This mapper is fully bidirectional.

For more information about channelized DS3 service and the DS3VTx12 mapper, see Channelized DS3 service (DS3VTx12 mapper) on page 2-44.

OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004