Nortel Networks 3500, NTRN10AN manual DS3x12 / DS3x12e mapper NTN435AA, AH / NTN435BA

Hardware feature descriptions 3-89

DS3x12 / DS3x12e mapper (NTN435AA, AH) / (NTN435BA)

The DS3x12 mapper (NTN435AA, NTN435AH) and DS3x12e (NTN435BA) mapper have 12 DS3 ports which function independently. Each mapper’s bandwidth capacity is 12 DS3 signals added/dropped in each slot. Each OPTera Metro 3500 shelf’s capacity is 48 DS3 add/drop signals, with 1+1 equipment protection for each circuit pack.

Mappers are installed in pairs and DS3 protection switching is 1+1 non-revertive for each mapper.

The DS3x12e mapper (NTN435BA) has the same functionality as the DS3x12 mapper (NTN435AA, NTN435AH), plus additional path PMs and alarms as follows:

Note: Neither the DS3x12 mapper, the DS3x12e mapper nor DS3 services are VT managed.

DS3 Path PMs (Near-End) available only on DS3x12e mapper

•CV-P (Coding Violation - Path) on DS3 Rx

•ES-P (Errored Second - Path) on DS3 Rx

•SES-P (Severely Errored Second - Path) on DS3 Rx

•UAS-P (Unavailable Second - Path) on DS3 Rx

DS3 alarms available only on DS3x12e mapper

•’DS3 Rx Frequency out of Range’ - DS3 is out of frequency in the Rx direction

•’DS3 Rx Parity > 10E-6’ - DS3 parity error rate exceeds 10E-6 in the Rx direction

•’DS3 Tx Frequency out of Range’ - DS3 is out of frequency in the Tx direction

•’STS Path Trace Mismatch’ - Path trace mismatch detected

Equipping rules

Connectivity for the twelve DS3 signals at each slot is through the BNC 12-Port Front I/O module (NTN452JA) on the OPTera Metro 3500 shelf (NTN476AA, NTN476DA). On the OPTera Metro 3500 Universal Shelf (NTN476AH) you must use the BNC 12-Port Front Enhanced I/O module (NTN452JH) or the BNC 12-Port Rear I/O module (NTN452KA).

The DS3x12 / DS3x12e mapper can be installed in slots 3 through 10. Mappers are installed in pairs. The first mapper of the pair is installed in an odd slot. The second mapper of the pair is installed in the adjacent even slot. The second mapper functions as protection for the working mapper in the odd slot.

Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004