Cisco DWDM-XENPAK Series Installation Notes page 5

Table 3 10-Gigabit XENPAK Port Cabling Specifications (continued)
XENPAK Product Number
XENPAK-10GB-LX4
XENPAK-10GB-CX4
XENPAK-10GB-LRM
1. Minimum cabling distance for optical XENPAK transceivers is 2 meters according to the IEEE 802.3ae standard.
2. Requires a 5 dB 1550 nm fixed loss attenuator for distances less than 20 km.
3. Links longer than 30 km are considered engineered links; meaning that for distances up to 30 km, no special link design rules need to be considered.
Link distances beyond 30 km require that you verify the cable characteristics, especially the cable's loss value.
4. When shorter distances of SMF are used, an inline optical attenuator (11 dB) must be used to avoid overloading and damaging the receiver.
Table 4 XENPAK Transceiver Optical Transmit and Receive Specifications
XENPAK Product
Number
XENPAK-10GB-SR
XENPAK-10GB-LR
XENPAK-10GB-LR+
XENPAK-10GB-LW
XENPAK-10GB-ER
XENPAK-10GB-ER+
XENPAK-10GB-ZR
XENPAK-10GB-LX4
XENPAK-10GB-LRM
1. Optical Modulation Amplitude (OMA) sensitivity
78-15665-07
Wavelength
(nm) Cable Type
1310 MMF
— CX4 (copper)
1310 MMF
Type
10GBASE-SR, 850 nm
MMF
10GBASE-LR 1310 nm
SMF
10GBASE-LR 1310 nm
SMF
10GBASE-ER 1550 nm
SMF
10GBASE-ZR 1550 nm
SMF
10GBASE-LX4 WWDM
1300 nm MMF
10GBASE-LR, 1310-nm
MMF
Modal
Core Size Bandwidth
(microns) (MHz/km)
62.5 500
50.0 400
50.0 500
— —
62.5 500
50.0 400
50.0 500
Transmit Power Receive Power
(dBm) (dBm)
–1.0 (Max) –1.2 (Max)
–7.3 (Min) –9.9 (Min)
+0.5 (Max) +0.5 (Max)
–8.2 (Min) –14.4 (Min)
+0.5 (Max) +0.5 (Max)
–8.2 (Min) –14.4 (Min)
+4 (Max) –1.0 (Max)
–4.7 (Min) –15.8 (Min)
+4 (Max) –7 (Max)
0 (Min) –24 (Min)
–0.5 per lane (Max) –0.5 (Max)
-6.75 per lane in –14.25 per lane
OMA (Min) in OMA
0.5 (Max) 0.5 (Max)
–6.5 (Min) -8.4 (Min
average) and
-6.4 (Min in
OMA)
Cisco 10-Gigabit Ethernet XENPAK Transceiver Modules Installation Note
Maximum Cabling
1
Distance
300 m (984.3 ft)
240 m (787.4 ft)
300 m (984.3 ft)
15 m (49.2 ft)
220 m (722 feet)
100 m (328 feet)
220 m (722 feet)
Transmit and
Receive Wavelength
(nm)
840 to 860
1260 to 1355
1260 to 1355
1530 to 1565
1530 to 1565
Four lanes; overall
range: 1269 to 1356
1
(Min)
1260 to 1355
Overview
5