Huawei NE05E Hardware Manual page 218

HUAWEI NE05E,NE08E
Hardware Guide
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Wavelength division multiplexing modules differ from other optical modules in
center wavelengths. A common optical module has a center wavelength of 850
nm, 1310 nm, or 1550 nm, whereas a wavelength division multiplexing module
transmits lights with different center wavelengths. Wavelength division
multiplexing modules are classified into two types: coarse wavelength division
multiplexing (CWDM) and dense wavelength division multiplexing (DWDM).
Within the same band, DWDM modules are available in more types and use
Issue 05 (2023-03-31)
fiber connectors. XFP optical modules are wider and longer than SFP+
optical modules.
– SFP28: with the same interface size as an SFP+ module. An SFP28
interface can use a 25GE SFP28 optical module or 10GE SFP+ optical
module.
– QSFP28: with the same interface size as a QSFP+ module. A QSFP28
interface can use a 100GE QSFP28 optical module or a 40GE QSFP+
optical module.
– QSFP+: quad small form-factor pluggable. QSFP+ optical modules
support MPO fiber connectors and are larger than SFP+ modules.
– QSFP-DD: quad small form factor pluggable-double density, it is a high-
speed pluggable module defined by the QSFP-DD MSA group.
– CXP: hot-pluggable high-density parallel optics transceiver form factor,
which provides 12 channels of traffic in each of the Tx and Rx directions.
It applies only to short multimode links.
– CFP: C form-factor pluggable, a new standard for high-speed, hot-
pluggable optical transceivers that support data communication and
telecommunication applications. Dimensions of a CFP optical module are
144.75 mm x 82 mm x 13.6 mm (W x D x H).
– CSFP: A Compact Small Form-Factor Pluggable (SFP) module is a Gigabit
Ethernet transceiver with two bidirectional channels inside a conventional
SFP form factor to address high-density port requirements in FTTx
deployments. Typically, this CSFP optical module is interconnected with
two BIDI SFP optical modules. During interconnection, the transmit and
receive wavelengths must match, and the transmission distances of the
optical modules at the two ends must be the same.
Classified by physical layer standards
Different physical layer standards are defined to allow data transmission in
different modes. Therefore, different types of optical modules are produced to
comply with these standards. For details, see Standards compliance of the
specific optical module.
Classified by modes
Optical fibers are classified into single-mode and multimode fibers. Therefore,
optical modules are also classified into single-mode and multimode modules
to support different optical fibers.
– Single-mode optical modules are used with single-mode fibers. Single-
mode fibers support a wide band and large transmission capacity, and are
used for long-distance transmission.
– Multimode optical modules are used with multimode fibers. Multimode
fibers have lower transmission performance than single-mode fibers
because of modal dispersion, but their costs are also lower. They are used
for small-capacity, short-distance transmission.
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