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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter 2 Cards Specifications
2.2.3 Optical Add and Drop Cards
2.2.3.4 32DMX-L Card
The 32DMX-L is a unidirectional unit that operates over the L band of the optical spectrum in
wavelengths from 1577 nm to 1605 nm. The 32DMX-L card receives the aggregate optical signal
through the COM-RX port and demultiplexes all 32 wavelengths onto its output ports. Every port has a
photodiode for optical power monitoring. The common path is equipped with a common VOA for optical
power regulation.
The single VOA on the common path is the main difference between the 32DMX-L card and the
32DMX-O card, which has 32 VOAs, one for each output port. The 32DMX-L cannot provide power
regulation for each individual channel.
Table 2-10 32DMX Card Optical Parameters and Insertion Loss
Parameter Condition Min Typical Max Unit
–1 dB Bandwidth COM RX => TX 1, 32
(OUT)
+/–110 — — pm
–3 dB Bandwidth +/–200 — —
Insertion Loss COM RX => TX 1, 32 — — 5.5 dB
Adjacent Crosstalk COM RX => TX 1, 32 26 — — dB
Nonadjacent Crosstalk 34 — —
Total Crosstalk 20 — —
PDL COM RX => TX 1, 32 — — 0.5 dB
In Band Chromatic
Dispersion
All paths –20 — +20 ps/nm
Group Delay Ripple All paths –10 — +10 ps
In Band PMD All paths — — 0.5 ps
VOA attenuation Setting
Resolution
— — — 0.1 dB
VOAAttenuationSetting
Accuracy
Attenuation range
0 – 10 dB
–0.5 + 0.5 dB
VOAAttenuationSetting
Precision
Attenuation range
0 – 10 dB
–0.1 + 0.1 dB
Power Monitoring
Indication Response
Time Internal Cycle
All PDs (both real and
virtual)
— — 20 ms
Optical Power/VOA
Attenuation Settling time
— — — 200 ms
VOA shut-off
Attenuation (AVS)
COM RX => TX 1, 32 40 — — dB
Directivity — 40 — — dB
Return Loss — 40 — — dB
Maximum Optical input
power
— 300 — — mW
MaximumAWGStart-up
time
— — — 10 min.