产品分类：应用指导
GLC-LH-SM是思科1000BASE-LX/LH SFP封装光模块，兼容IEEE802.3z标准1000BASE-LX标准，工作标准单模光纤链路传输距离达10公里，另外在任何多模光纤上传输可高达 10公里的距离。但使用在传统的多模光纤类型介质上时，发射器应连接上模式调节线缆，以保证GLC-LH-SM光模块能在多模光纤类型介质上传输。
GLC-LH-SM为思科SFP光模块1000BASE-LX/LH，可用于SMF和MMF，1310纳米波长，商业工作温度范围32°F至158°F（0°C至70°C）,双LC / PC连接器，不支持DOM
思科的GLC-LH-SM支持多种思科交换机，路由器和光传输设备。包括：ASA5500与NAM 2200两个系列平台。
下表为思科SFP系列光模块端口布线规格：
|
Product |
Wavelength (nm) |
Fiber Type |
Core Size (μm) |
Modal Bandwidth (MHz* Km)*** |
Operating Distance (m) |
|
1000BASE-SX |
850 |
MMF |
62.5 |
160 (FDDI-grade) |
220 (722 ft) |
|
62.5 |
200 (OM1) |
275 (902 ft) |
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|
50 |
400 (400/400) |
500 (1,640 ft) |
|||
|
50 |
500 (OM2) |
550 (1,804 ft) |
|||
|
50 |
2000 (OM3) |
1000 (3281 ft) |
|||
|
1000BASE-LX/LH |
1310 |
MMF* |
62.5 |
500 |
550 (1,804 ft) |
|
50 |
400 |
550 (1,804 ft) |
|||
|
50 |
500 |
550 (1,804 ft) |
|||
|
SMF |
-** |
- |
10,000 (32,821 ft) |
||
|
1000BASE-EX |
1310 |
SMF |
-** |
- |
40,000 (131,234 ft) |
|
1000BASE-ZX |
1550 |
SMF |
- |
- |
Approximately 70 km depending on link loss |
|
1000BASE-BX-U |
1310 |
SMF |
-** |
- |
10,000 (32,821 ft) |
|
1000BASE-BX-D |
1490 |
SMF |
-** |
- |
10,000 (32,821 ft) |
下表为思科SFP系列光模块主要光学参数：
|
Product |
Transmit Power Range (dBm) |
Receive Power Range (dBm) |
Maximum Channel insertion loss in dB (by fiber type)* |
Transmit and Receive Wavelength Range (nm) |
|
1000BASE-SX |
-3 to -9.5 |
0 to -17 |
2.4 (FDDI-grade) |
770 to 860 |
|
1000BASE-LX/LH |
-3 to -9.5 |
-3 to -20 |
2.4 (any MMF) |
1270 to 1355 |
|
1000BASE-EX |
+3 to -1 |
+1 to -22 |
18 (G.652 SMF) |
1290 to 1335 |
|
1000BASE-ZX |
+5 to 0 |
-3 to -23 |
21 (any SMF) |
1500 to 1580 |
|
1000BASE-BX10-D |
-3 to -9 |
-3 to -19.5 |
5.5 (G.652 SMF) |
1480 to 1500 (Transmit) 1260 to 1360 (Receive) |
|
1000BASE-BX10-U |
-3 to -9 |
-3 to -19.5 |
6 (G.652 SMF) |
1260 to 1360 (Transmit) 1480 to 1500 (Receive) |