OC-3/STM-1 PTM optical specification

Overview

The VLNC50/52/55 supports up to two OC-3/STM-1 or OC-12/STM-4 connections. The VLNC55 can also support OC-48/STM-16 connections. Either the VLIU1 or VLIU10 interface unit is required to support VLNC50 equipment protection (UNPROT/PROT). The VLIU10 interface unit is required to support VLNC52/55 equipment protection (UNPROT/PROT).

When UNPROT (protection-not-allowed), protection is between the two optical lines on the VLNC50/52/55 circuit pack in Main slot 1. The values of the port Application and Signal Type parameters for both optical lines on the circuit pack must be the same value.

The VLNC64 circuit pack supports a single OC-3/STM-1.

System specifications

The following table lists the system specifications for OC-3/STM-1 PTM interfaces.

Table 10-7: OC-3/STM-1 PTM optical system specifications

System information	OC-3 SR-1/STM-1 I-1	OC-3 IR-1/STM-1 S-1.1	OC-3 LR-1/STM-1 L-1.1	OC-3/STM-1 CWDM-LR
Optical Line Rate	155.52 Mb/s
Optical Line Coding	Scrambled NRZ
Optical Wavelength	1310 nm			Refer to Table 10-8, OC-3/STM-1 or OC-12/STM-4 CWDM-LR PTM wavelengths.
Performance	Short Reach, SR-1/I-1	Intermediate Reach, IR-1/ S-1.1	Long Reach, LR-1/L-1.1	Coarse Wavelength Division Multiplexing (CWDM), Long Reach
Temperature Range	OSP Hardened/Industrial (−40°C to 85°C)			Extended temperature range (−5°C to 85°C)

Table 10-8: OC-3/STM-1 or OC-12/STM-4 CWDM-LR PTM wavelengths

Apparatus Code	Channel #	Wavelength
S622C47EL	47	1471 nm
S622C49EL	49	1491 nm
S622C51EL	51	1511 nm
S622C53EL	53	1531 nm
S622C55EL	55	1551 nm
S622C57EL	57	1571 nm
S622C59EL	59	1591 nm
S622C61EL	61	1611 nm

Transmitter specifications

The table below lists the OC-3/STM-1 PTM transmitter information.

Table 10-9: OC-3/STM-1 PTM optical transmitter information

Transmitter information	OC-3 SR-1/STM-1 I-1	OC-3 IR-1/STM-1 S-1.1	OC-3 LR-1/STM-1 L-1.1	OC-3/STM-1 CWDM-LR
Optical Device Temperature Controller	None
IEC 60825 Laser Classification	Class 1
FDA Laser Classification	Class I
Optical Source	Fabry Perot (FP)/Light Emitting Diode (LED) Laser	Fabry Perot (FP) Laser	Fabry Perot (FP)/Distributed Feed-Back (DFB) Laser	Distributed Feed-Back (DFB) Laser

Receiver specifications

The table below lists the OC-3 PTM receiver information.

Table 10-10: OC-3/STM-1 PTM optical receiver information

Receiver information	OC-3 SR-1/STM-1 I-1 OC-3 IR-1/STM-1 S-1.1 OC-3 LR-1/STM-1 L-1.1	OC-3/STM-1 CWDM-LR
Optical Detector	InGaAsP PIN	Avalanche Photo Diode (APD)
Faceplate Optical Connector	LC connector

Link budgets

The table below lists the OC-3/STM-1 PTM link budgets.

Table 10-11: OC-3/STM-1 PTM optical specifications and link budgets

Parameter	OC-3 SR-1/ STM-1 I-1 1	OC-3 IR-1/ STM-1 S-1.1 1	OC-3 LR-1/ STM-1 L-1.1 1	OC-3/STM-1 CWDM-LR 2
Minimum Wavelength	1260 nm	1261 nm	1263 nm	λc −7 nm
Maximum Wavelength	1360 nm	1360 nm	1360 nm	λc +7 nm
Maximum Spectral Width (Δλ20)	NA	NA	NA /1.0 nm 3	1.0 nm
Maximum RMS Spectral Width (σ)	40/80 nm	7.7 nm	3.0 nm /NA 3	NA
Minimum Side-Mode Suppression Ratio (SSMR)	NA	NA	NA /30 dB 3	30 dB
Maximum Transmitter Power	−8.0 dBm	−8.0 dBm	0.0 dBm	+5.0 dBm
Minimum Transmitter Power	−15.0 dBm	−15.0 dBm	−5.0 dBm	−1.0 dBm
Maximum Received Power	−8.0 dBm	−8.0 dBm	−10.0 dBm	−9.0 dBm
Minimum Received Power (1x10−10 BER)	−23.0 dBm	−28.0 dBm	−34.0 dBm	−28.0 dBm
System Gain 4	8.0 dB	13.0 dB	29.0 dB	27.0 dB
Maximum Dispersion	NA	NA	NA	1600 ps/nm
Optical Path Penalty 5	1.0 dB	1.0 dB	1.0 dB	1.0 dB
Minimum Optical Return Loss 6	NA	20.0 dB	24.0 dB	24.0 dB
Maximum Receiver Reflectance 6	NA	−14.0 dB	−27.0 dB	−27.0 dB
Minimum Loss Budget 7	0 dB	0 dB	10.0 dB	14.0 dB
Maximum Loss Budget 8	7.0 dB	12.0 dB	28.0 dB	26.0 dB
Target Distance 9	2 km	15 km	40 km	96 km

Notes:

1. All terminology is consistent with GR-253-CORE, Issue 3 and ITU-T G.957. All values are worst-case end of life. Optical specifications meet or exceed equivalent GR-253-CORE and ITU-T G.957 requirements.

2. The OC-3/STM-1 CWDM PTMs can also operate as OC-12/STM-4 PTMs.

3. x/y: x is using Fabry Perot (FP) and y is using Distributed Feed-Back (DFB) laser.

4. The System Gain is Minimum Transmitter Power minus Minimum Received Power.

5. Optical path penalty includes effects of dispersion, reflection, and jitter that occur on the optical path. The optical path penalty for 1310 nm optics is normally 1.0 dB.

6. Refer to GR-253-CORE for more information about these parameters.

7. For all packs where the Minimum Loss Budget (MLB) is 0, no attenuator is required for loopbacks. For all packs where the MLB is greater than 0, an attenuator is required. The value of the LBO must be equal to or greater than the MLB.

8. The stated maximum loss budgets are assumed to be worst-case values including losses due to splices, connectors, optical attenuators or other passive optical devices, and any additional cable margin.

9. The target distance assumes that passive optical units are not being used.