Table 1 describes transceiver modules and network cables available for H3C devices. All these transceiver modules and network cables are hot swappable.

Table 1 Transceiver modules and network cables available for H3C devices

Transceiver module and network cable type		Interface connector	Data rate
QSFP-DD module (transceiver)	QSFP-DD optical transceiver module	Dual LC	400 Gbps
	QSFP-DD optical transceiver module	MPO
	QSFP-DD copper cable	N/A
QSFP56 module (transceiver)	QSFP56 optical transceiver module	MPO	200 Gbps
	QSFP56 optical transceiver module	LC
	QSFP56 copper cable	N/A
	QSFP56 to QSFP56 copper cable
	QSFP56 fiber cable
QSFP28 module (transceiver)	QSFP28 optical transceiver module	MPO/dual LC	100/50 Gbps
	QSPF28 BIDI optical transceiver module	Dual LC	100 Gbps
	QSFP28 copper cable	N/A
	QSFP28 fiber cable	N/A
CFP module (transceiver)	100-Gigabit CFP optical transceiver module	Dual LC	100 Gbps
CFP module (transceiver)	40-Gigabit CFP optical transceiver module	Dual LC	100 Gbps
CFP2 module (transceiver)	CFP2 optical transceiver module	MPO/dual LC	100 Gbps
CXP module (transceiver)	100-Gigabit CXP optical transceiver module	MPO	100 Gbps
CXP module (transceiver)	100-Gigabit CXP fiber cable	N/A	100 Gbps
QSFP+ module (transceiver)	QSFP+ optical transceiver module	MPO/dual LC	40 Gbps
	QSPF+ BIDI optical transceiver module	Dual LC
	QSFP+ copper cable (for interconnecting QSFP+ ports)	N/A
	QSFP+ to SFP+ copper cable (for connecting one 40-Gigabit QSFP+ port to four 10-Gigabit SFP+ ports)	N/A
	QSFP+ fiber cable	N/A
SFP28 module (transceiver)	SFP28 optical transceiver module	Dual LC	25 Gbps
	SFP28 copper cable	N/A
	SFP28 fiber cable	N/A
SFP+ module (transceiver)	SFP+ optical transceiver module	Dual LC/SC	10 Gbps
	SFP+ BIDI optical transceiver module	Dual LC
	SFP+ copper cable (for interconnecting devices)	N/A
	SFP+ fiber cable	N/A
PSFP+ module	PSFP+ optical transceiver module	PELC	10/5/2.5/1 Gbps
10-Gigabit small form-factor pluggable (XFP) module (transceiver)	XFP optical transceiver module	Dual LC	See Table 63.
	10G EPON OLT optical transceiver module	SC	See Table 65.
10-Gigabit CX4 cable (for interconnecting devices)		N/A	12 Gbps
PSFP module	PSFP optical transceiver module	PELC	1250 Mbps
Small form-factor pluggable (SFP) module (transceiver)	2.5-Gigabit SFP optical transceiver module	Dual LC	2.5 Gbps
	Gigabit SFP optical transceiver module		1250 Mbps
	622-Megabit SFP optical transceiver module		622 Mbps
	100-Megabit SFP optical transceiver module		155 Mbps
	Gigabit bi-direction (BIDI) optical transceiver module	Dual LC	1250 Mbps
	100-Megabit bi-direction (BIDI) optical transceiver module	Dual LC	155 Mbps
	BIDI GEPON OLT optical transceiver module	SC	1250 Mbps
	Gigabit GPON ONU optical transceiver module	SC	1250 Mbps
	Gigabit coarse wavelength division multiplexing (CWDM) optical transceiver module	Dual LC	1250 Mbps
	Gigabit SFP copper transceiver module	RJ-45	1250 Mbps
	Gigabit SFP copper cable (for interconnecting devices)	N/A	1250 Mbps

IMPORTANT:

The commercial outer casing temperature range is 0°C to 70°C (32°F to 158°F) and industrial outer casing temperature range is –40°C to +85°C (–40°F to +185°F) for H3C transceiver modules. The commercial temperature range is applicable to all transceiver modules except for transceiver modules marked with * and transceiver modules with special temperature requirements specified in this document. An abnormal outer casing temperature might reduce the performance, signal transmission quality, and link status of the transceiver module, and even damage the transceiver module.

NOTE:

· The available transceiver modules and network cables vary by device models and are subject to change over time. For the most up-to-date list of transceiver modules and network cables, contact your H3C sales representative or technical support engineer.

· For information about the transceiver modules and network cables available for each device model, see the installation guides.

Optical transceiver modules

Optical modules transmit signals over optical fibers. Optical transmission features low loss and is fit for long distance transmission.

H3C devices support optical module models of different specifications. You can choose optical modules as needed for data transmission over optical fibers.

The optical modules include optical transmitters, optical receivers, transceivers, and transponders.

H3C devices support transceivers. Transceivers are mainly used for optical-to-electrical and electrical-to-optical conversions and provide the following functions: optical power control, modulation transmission, signal probe, IV conversion, and limiting amplifier and decision regeneration. In addition, transceivers provide some other functions, such as counterfeit-prevention query and TX-disable. Common form factors for transceiver modules include QSFP-DD, QSFP56, QSFP28, CFP, CFP2, CXP, QSFP+, SFP28, SFP+, and SFP.

Data rate

Data rate is the number of bits transmitted per second, measured in Megabits per second (Mbps) or Gigabits per second (Gbps). Optical transceiver modules available for H3C devices mainly provide the following levels of data rates: 400 Gbps, 200 Gbps, 100 Gbps, 50 Gbps, 40 Gbps, 32 Gbps, 25 Gbps, 16 Gbps, 10 Gbps, 8 Gbps, 4 Gbps, 2.5 Gbps, 2 Gbps, 1 Gbps, 622 Mbps, 155 Mbps, and 100 Mbps.

Transmission distance

The transmission distance of optical transceiver modules is divided into short and long-range types. A distance of 2 km (1.24 miles) and below is generally considered as short-range type. 10 km (6.21 miles) is considered as long-range type.

Transmission distances provided by optical transceiver modules are mainly limited by certain loss and dispersion suffered during the transmission of optical signals over optical fibers.

· Loss is the optical energy loss due to the absorption, dispersion and leakage over the media when light travels through optical fibers. This loss increases in direct ratio to transmission distance.

· Dispersion happens mainly because electromagnetic waves of different wavelengths travel at different rates over the same medium, causing different wave components of optical signals to reach the receiving end early or late as the transmission distance increases, which in turn causes impulse broadening, making the signal values indistinguishable.

To meet different transmission distance requirements, choose optical transceiver modules according to actual networking conditions.

Central wavelength

Central wavelength represents the wave band used for optical signal transmission. At present, there are mainly three central wavelengths for common optical transceiver modules: 850 nm, 1310 nm, and 1550 nm, respectively representing three wavebands.

· The 850 nm wave band is mainly used for short-reach transmission.

· The 1310 nm and 1550 nm wave bands are mainly used for middle- and long-reach transmission.

Fiber

Fiber types

Fibers are classified as multimode fibers and single-mode fibers.

· Multimode fibers

Multimode fibers (MMFs) have thicker fiber cores and can transport light in multiple modes. However, the inter-mode dispersion is greater and worsens as the transmission distance increases.

Multimode fibers can be classified into multiple grades according to their diameters and modal bandwidth. For more information, see Table 2. The modal bandwidth of a multimode fiber is determined by the expression the modulation frequency of the maximum modulation frequency pulse that can pass a fiber × the fiber length. The modal bandwidth is a comprehensive index reflecting the optical characteristics of a multimode fiber.

International Telecommunication Union (ITU) defines multimode fiber types in its G series standards. The commonly-used multimode fiber is defined in the ITU G.651 standard. The G.651-compliant fiber transmits light at the wavelength range 800 nm to 900 nm or 1200 nm to 1350 nm.

Table 2 Multimode fiber grades

Fiber mode	Fiber grade	Fiber diameter (μm)	Modal bandwidth at 850 nm (MHz*km)
Multimode fiber	OM1	62.5/125	200
	OM2	50/125	500
	OM3	50/125	2000
	OM4	50/125	4700

Other factors that influence the transmission distance of multimode fibers include interface type, central wavelength, and fiber grade. For more information, see Table 3.

Table 3 Multimode fiber specifications

Interface type	Central wavelength (nm)	Fiber grade	Transmission distance
1000BASE-SX	850	OM1	< 275 m (902.23 ft)
1000BASE-SX	850	OM2	< 550 m (1804.46 ft)
10GBASE-SR	850	OM1	< 33 m (108.27 ft)
		OM2	< 82 m (269.03 ft)
		OM3	< 300 m (984.25 ft)
		OM4	< 400 m (1312.34 ft)
40GBASE-CSR4	850	OM3	< 300 m (984.25 ft)
40GBASE-CSR4	850	OM4	< 400 m (1312.34 ft)
40GBASE-SR4	850	OM3	< 70 m (229.66 ft)
40GBASE-SR4	850	OM4	< 100 m (328.08 ft)
100GBASE-eSR4	850	OM4	< 300 m (984.25 ft)
100GBASE-SR4	850	OM3	< 70 m (229.66 ft)
100GBASE-SR4	850	OM4	< 100 m (328.08 ft)
200GBASE-SR4	850	OM3	< 70 m (229.66 ft)
200GBASE-SR4	850	OM4	< 100 m (328.08 ft)
400GBASE-SR8	850	OM3	< 70 m (229.66 ft)
400GBASE-SR8	850	OM4	< 100 m (328.08 ft)
25GBASE-SR	850	OM3	< 70 m (229.66 ft)
25GBASE-SR	850	OM4	< 100 m (328.08 ft)

· Single-mode fibers

Single-mode fibers (SMFs) have a small core size, typically 9 μm or 10 μm, and can transmit light in only one mode. Single-mode fibers suffer little inter-mode dispersion and are suitable for long-reach communication. Single-mode fibers transmit light at the central wavelength of 1310 nm or 1550 nm.

Telecommunication Industries Alliance (TIA)/Electronic Industries Alliance (EIA) defines that single-mode fibers use yellow outer jackets with the mark "SM".

ITU defines single-mode fiber types in its G series standards. The mostly-commonly used single-mode fibers are defined in ITU G.652 and G.655 standards. Table 4 describes features of the G.652 and G.655-compliant fibers.

Table 4 Features of G.652 and G.655-compliant fibers

Single-mode fiber type	Wavelength (nm)	Features	Applications
G.652-compliant fiber (standard single-mode fiber)	· 1260 to 1360 · 1530 to 1565	Zero dispersion at 1310 nm.	Connecting transceiver modules with a central wavelength of 1310 nm or 1550 nm.
G.655-compliant fiber (non-zero dispersion shifted fiber)	1530 to 1565	Near-zero dispersion around 1550 nm.	For 1550-nm wavelength-division multiplexing (WDM) transmissions.

Single-mode fiber type

Wavelength (nm)

Features

Applications

G.652-compliant fiber (standard single-mode fiber)

· 1260 to 1360

· 1530 to 1565

Zero dispersion at 1310 nm.

Connecting transceiver modules with a central wavelength of 1310 nm or 1550 nm.

G.655-compliant fiber (non-zero dispersion shifted fiber)

1530 to 1565

Near-zero dispersion around 1550 nm.

For 1550-nm wavelength-division multiplexing (WDM) transmissions.

Fiber diameter

Fiber diameter is generally expressed as core diameter/cladding diameter, in μm. For example, 9/125 μm means the fiber core diameter is 9 μm and the fiber cladding diameter is 125 μm.

For the H3C devices, the following fiber diameters are recommended:

· G.652 standard single-mode fiber—9/125 μm.

· G.655 single-mode fiber—9/125 μm.

· G.651 standard multimode fiber—50/125 μm or 62.5/125 μm.

Connector

CAUTION:

Cover the connector with a dust cap when it is not connected to any optical fiber.

Connectors connect transceiver modules to the corresponding transmission media. The optical transceiver modules available for H3C devices use the following types of connectors:

· Subscriber connector standard connector (SC).

Figure 1 SC connector

· Lucent connector or local connector (LC).

Figure 2 LC connector

· Multi-fiber Push On connector (MPO).

Figure 3 MPO connector

H3C transceiver modules use only female MPO connectors, which have guide holes in the end face.

MPO connectors are classified as the following types based on the polish type:

¡ Physical contact (PC)—End face polished flat.

¡ Angle-polished contact (APC)—End face polished with an angle, typically 8°.

MPO connectors are available with 12 fibers, 16 fibers, or 24 fibers:

¡ 12-fiber MPO connector

Figure 4 End face of a 12-fiber connector

¡ 16-fiber MPO connector

Figure 5 End face of a 16-fiber connector

¡ 24-fiber MPO connector

Figure 6 End face of a 24-fiber connector

Optical specifications

CAUTION:

The average transmit power of a long-haul optical transceiver module is greater than the saturated optical power. Be careful about the length of the optical fiber you use to make sure the actual receive power reaching the optical transceiver module is less than its saturated optical power. Otherwise, the optical transceiver module might be damaged.

NOTE:

Average transmit and receive power ranges are provided for transceiver modules in this guide.

Transmit power

Transmit power is the power at which the transmitter of an optical transceiver module transmits optical signals, in dBm.

Receive power

Receive power is the power at which the receiver of an optical transceiver module receives optical signals, in dBm.

Receiving sensitivity

Receiving sensitivity is the minimum optical power that is needed at the receiving end for the optical module to receive optical signals at a given data rate and bit error rate, in dBm. The higher the data rate is, the worse the receiving sensitivity is, the greater the minimum receive power is. A greater receive power has higher requirements on the receiving components of the optical module.

Saturated optical power

Saturated optical power (also known as optical saturation) is the maximum receive power at a given data rate and bit error rate range (10-10 to 10-12), in dBm.

Saturated photocurrent occurs if a fiber probe is irradiated by intensive light. When this occurs, it takes the probe some time to recover. In this case, the receiving sensitivity worsens and the received signals may be decided incorrectly, causing bit errors. This will probably damage the receiving probe. Therefore, when you perform operations, try to maintain a normal saturated optical power level.

Copper transceiver modules

Copper transceiver modules, also called RJ-45 modules, transmit electrical signals over twisted pair cables and do not provide conversion between electrical and optical signals. Compared with optical fibers, twisted pair cables provide a short transmission distance, suitable only for small-scale networking environments.

You can use copper transceiver modules to connect two fiber ports over a network cable.

H3C devices support SFP and SFP+ copper transceiver modules.