GLC-ZX-SMD
GLC-ZX-SMD Обзор
When shorter distances of single-mode fiber (SMF) are used, it might be necessary to insert an inline optical attenuator in the link to avoid overloading the receiver. A 10-dB inline optical attenuator should be inserted between the fiber-optic cable plant and the receiving port on the SFP at each end of the link whenever the fiber-optic cable span loss is less than 8 dB.
Figure 1 shows the GLC-ZX-SMD can be installed in the switch.
Table 1 provides cabling specifications for the SFPs that you install in the Gigabit Ethernet port.
Note that all SFP ports have LC-type connectors, and the minimum cable distance for all SFPs listed (multimode and single-mode fiber) is 6.5 feet (2 m).
SFP Port Cabling Specifications
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) |
|||
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) |
Note:
*A mode-conditioning patch cord, as specified by the IEEE standard, is required regardless of the span length. Note how the mode conditioning patch cord for 62.5-μm fibers has a different specification from the mode-conditioning patch cord for 50-μm fibers.
**ITU-T G.652 SMF as specified by the IEEE 802.3z standard.
***Specified at transmission wavelength.
SFP Port Cabling Specifications |
|||||
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) |
|||
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 (GLC-ZX-SMD) |
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) |