![Cisco DWDM-XENPAK Series Скачать руководство пользователя страница 5](http://html.mh-extra.com/html/cisco/dwdm-xenpak-series/dwdm-xenpak-series_installation-notes_67768005.webp)
5
Cisco 10-Gigabit Ethernet XENPAK Transceiver Modules Installation Note
78-15665-07
Overview
XENPAK-10GB-LX4
1310
MMF
62.5
50.0
50.0
500
400
500
300 m (984.3 ft)
240 m (787.4 ft)
300 m (984.3 ft)
XENPAK-10GB-CX4
—
CX4 (copper)
—
—
15 m (49.2 ft)
XENPAK-10GB-LRM
1310
MMF
62.5
50.0
50.0
500
400
500
220 m (722 feet)
100 m (328 feet)
220 m (722 feet)
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
Type
Transmit Power
(dBm)
Receive Power
(dBm)
Transmit and
Receive Wavelength
(nm)
XENPAK-10GB-SR
10GBASE-SR, 850 nm
MMF
–1.0 (Max)
–7.3 (Min)
–1.2 (Max)
–9.9 (Min)
840 to 860
XENPAK-10GB-LR
XENPAK-10GB-LR+
10GBASE-LR 1310 nm
SMF
+0.5 (Max)
–8.2 (Min)
+0.5 (Max)
–14.4 (Min)
1260 to 1355
XENPAK-10GB-LW
10GBASE-LR 1310 nm
SMF
+0.5 (Max)
–8.2 (Min)
+0.5 (Max)
–14.4 (Min)
1260 to 1355
XENPAK-10GB-ER
XENPAK-10GB-ER+
10GBASE-ER 1550 nm
SMF
+4 (Max)
–4.7 (Min)
–1.0 (Max)
–15.8 (Min)
1530 to 1565
XENPAK-10GB-ZR
10GBASE-ZR 1550 nm
SMF
+4 (Max)
0 (Min)
–7 (Max)
–24 (Min)
1530 to 1565
XENPAK-10GB-LX4
10GBASE-LX4 WWDM
1300 nm MMF
–0.5 per lane (Max)
-6.75 per lane in
OMA (Min)
–0.5 (Max)
–14.25 per lane
in OMA
1
(Min)
1.
Optical Modulation Amplitude (OMA) sensitivity
Four lanes; overall
range: 1269 to 1356
XENPAK-10GB-LRM
10GBASE-LR, 1310-nm
MMF
0.5 (Max)
–6.5 (Min)
0.5 (Max)
-8.4 (Min
average) and
-6.4 (Min in
OMA)
1260 to 1355
Table 3
10-Gigabit XENPAK Port Cabling Specifications (continued)
XENPAK Product Number
Wavelength
(nm)
Cable Type
Core Size
(microns)
Modal
Bandwidth
(MHz/km)
Maximum Cabling
Distance
1