Cisco Systems 15454 specifications 3.2 32WSS-L Card, Parameter Condition Min Typical Max

Chapter 2 Cards Specifications

2.2.3 Optical Add and Drop Cards

Table 2-8	32WSS Card Parameters and Performance (continued)
Parameter		Condition		Min		Typical		Max		Unit
Directivity		Add 1,32 <=> Add 1,32		40		—	—		dB
		Add 1, 32 <=> EXP RX
Return loss		—	40		—		—		dB
Maximum optical input		—	300		—		—		mW
power
Maximum AWG startup		—	—		—		10		min.
time

2.2.3.2 32WSS-L Card

The 32WSS-L card is capable of operating bidirectionally over the L band of the optical spectrum (wavelengths from 1577 nm to 1605 nm).

In one line direction, the EXP-RX port receives the aggregate optical signal. The first arrayed wavelength grating (AWG) opens the spectrum and each wavelength goes through a 1x2 optical switch, where the same wavelength can be added from its ADD port. A dedicated per-channel VOA allows per-channel power regulation. The second AWG multiplexes all the wavelengths and the aggregate signal goes through the COM-TX output port.

In the other line direction, the aggregate optical signal comes in from the COM-RX port. An 80/20 splitter (80 Express/20 Drop) sends the optical signals on two output ports, the DROP-TX port for demultiplexing and dropping wavelengths, and the EXP-TX port for the next stage.

Each input and output port is equipped with either a real or a virtual photodiode. All VOAs for the

32channels and switches are software-controlled for remote reconfiguration. Table 2-9defines all optical internal parameters and performances details.

	Table 2-9	32WSS-L Card Parameters and Performance
	Parameter		Condition	Min	Typical	Max		Unit
	–0.5 dB bandwidth		EXP RX => COM TX	+/–91	116	—			pm
	–0.5 dB bandwidth		Add 1, 32 => COM TX	+/–135	161	—
	Insertion loss		EXP RX => COM TX	—	9.7	11.3	dB
			COM RX => EXP TX	—	1.4	1.6
			Add 1, 32 => COM TX	—	6.2	8.0
			COM RX => DROP TX	6	8	8.5
	Adjacent crosstalk		Add 1, 32	23	30	—	dB
	Multi path interference		EXP RX => COM TX	41	49	—
	Nonadjacent crosstalk		Add 1, 32	30	42	—
	PDL		EXP RX => COM TX	—	0.5	0.9	dB
			COM RX => EXP TX	—	0.5	0.9
			Add 1, 32 => COM TX	—	0.7	1.5
			COM RX => DROP TX	—	0.7	1.3
			Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006										2-21