Table Of Contents

Single Optical S-16.1 Module, S16.1-1-LC

9.1  Module Description

9.1.1  Power Consumption

9.2  External Interface

9.2.1  Connector Type

9.2.2  Optical Budget

9.2.3  Traffic Alarms

Single Optical S-16.1 Module, S16.1-1-LC

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9.1  Module Description

The module contains one optical STM-16 interfaces that meets the S-16.1 specification in ITU-T G.957. The physical connector is a LC connector. The module only supports TDM traffic.

9.1.1  Power Consumption

The module power consumption is 13 W.

9.2  External Interface

The interface is an optical STM-16 short haul interface, according to clause 5 ITU-T G.957 The definitions of optical parameters and reference points S and R refer to ITU-T G.957. Reference point S means transmit direction while R is the receive direction of the fibre.

9.2.1  Connector Type

The physical connector is a LC connector. See Figure 9-1.

Figure 9-1 Single Optical S-16.1 Module, S16.1-1-LC

9.2.2  Optical Budget

S-16.1 optical budget is found in Table 9-1.

Table 9-1 Optical Budget S-16.1 

Parameter	Value
Modulation rate on optical line	2488 380 kbit/s
Wavelength range	1261 - 1360 nm
Transmitter at reference point S
Source type	SLM
Maximum -20dB width	1nm
minimum side mode suppression ratio	30dB
Mean launched power (max.)	0dBm
Mean launched power (min.)	-5 dBm
Min. extinction ratio	8.2 dB
Optical path between S and R
Attenuation range	0 - 12 dB
Max. tolerable dispersion	NA
Min. optical return loss at S inc. any connectors	24dB
Max. discrete reflectance between S and R	-27dB
Receiver at reference point R
Min. sensitivity (BER < 1 in 1010)	-18 dBm
Min. overload	0 dBm
Max. optical path penalty	1 db
Max. reflectance at R	-27dB

9.2.3  Traffic Alarms

•Rx direction

–Loss of signal (LOS): Traffic Alarm. Optical power of input signal is below receiver sensitivity level.

–Loss of lock (LOL): Indicates clock recovery of deserializer is out of lock. Signal must be present for indication to be valid. Indication to be reported as unit failure alarm.

Transmit failure: Laser degradation

Posted: Fri Sep 14 10:51:30 PDT 2007
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