8-Channel Single Fiber CWDM Mux/Demux (Side B): SCMD-8B
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Schematic representation showing exact port count and wavelength configuration. Front panel updates as you configure.
SCMD-8B-2757-M
8-Channel Single Fiber CCWDM Mux/Demux Side B Overview
The SCMD-8B is an 8-channel (16-wavelength) single fiber passive CWDM mux/demux for Side B of a CWDM link, available across two ITU-T G.694.2 wavelength bands (1271-1571nm or 1311-1611nm) with insertion loss below 1.8 dB and a built-in monitoring tap. Housing is configurable: mini-LGX, LGX, or 19 inch 1U rackmount; specify the matching SCMD-8A unit for the near end of the link.
- xWDM Technology: BiDi CWDM
- Number of Data Streams: 8
- Number of Optical Channels: 16
- Connector: LC/UPC
- Filter Technology: CCWDM (Compact CWDM – Free Space Technology)
- Insertation Loss (Passband): 1.8 dB
- Operating Temperature: -5 °C - 70 °C
- MTBF: 1000000 hours
SCMD-8B Configurator & Pricing
Configure your product below — the price, SKU and images update with every choice.
Review your configuration
- Housing
- mini-LGX Type (-M)mini-LGX Type (-M)
- Wavelength (CWDM)
- 1271-1571nm (-2757)1271-1571nm (-2757)
- Window Port
- NoNo
- EXP Expansion Port
- NoNo
SCMD-8B Mux/Demux Pricing
SKU:SCMD-8B-2757-MSCMD-8B-2757-M
Special Order - Up to 4 WeeksSpecial Order - Up to 4 Weeks8-Channel Single Fiber CWDM Mux/Demux (Side B) Specification
Product Type | BiDi CWDM MUX/DEMUX Unit |
Number of Data Streams | 8 |
Number of Optical Channels | 16 |
Connector | LC/UPC |
Operating Wavelengths | 8 CWDM Channel pairs, two selectable bands: 1271-1571nm or 1311-1611nm |
Channel Spacing | 20 nm |
Passband | ± 6.5 nm (λ center) |
Filter Technology | CCWDM (Compact CWDM – Free Space Technology) |
Insertation Loss (Passband) | 1.8 dB |
Insertion Loss (1% Monitor Port) | 23 dB |
Monitoring Port Type | 1% Monitoring Port |
Isolation Adjacent Channels | 30 dB |
Isolation Non-Adjacent Channels | 40 dB |
Channel Pass-band Ripple | 0.3 dB |
Polarization Dependent Loss (PDL) | 0.2 dB |
Polarization Mode Dispersion (PMD) | 0.1 ps |
Directivity | 50 dB |
Return Loss | 45 dB |
Maximum Power Handling | 500 mW |
Operating Temperature | -5 °C - 70 °C |
Operating Humidity | 5 % - 95 % |
Storage Temperature | -40 °C - 85 °C |
MTBF | 1000000 hours |
Compliance | CE, ISO, ITU-T G.694.2, RoHS |
Insertion Loss Temperature | 0.005 dB/°C |
8-Channel Single Fiber CWDM Mux/Demux (Side B) Datasheet
v9Complete technical specifications and product details
8-Channel Single Fiber CWDM Mux/Demux (Side B) Description
The SCMD-8B is the Side B unit of an 8-channel single fiber CWDM mux/demux pair, carrying eight data streams as 16 optical channels over one fiber strand. It is available in two selectable wavelength bands on the ITU-T G.694.2 20 nm CWDM grid: 1271 to 1571 nm or 1311 to 1611 nm, chosen at order time. The companion SCMD-8A carries the corresponding A side at the far end and must be ordered in the same wavelength band; a mismatched band pairing will not line up the channel plan. Both units are required, one on each end of the link, to complete a bidirectional connection.
Each channel passes through free-space CCWDM filters with a passband of plus or minus 6.5 nm. Insertion loss through the passband is 1.8 dB, with adjacent and non-adjacent channel isolation of 30 dB and 40 dB. Channel pass-band ripple is 0.3 dB. Polarization dependent loss is 0.2 dB, polarization mode dispersion is 0.1 ps, directivity is 50 dB and return loss is 45 dB. Input power is rated up to 500 mW, operating temperature is -5 to 70 degrees C, and MTBF is rated at 1,000,000 hours. Connectors are LC/UPC. The unit complies with CE, ISO and RoHS requirements.
A 1% monitoring port is built into the unit, tapping a small fraction of the multiplexed signal for optical power measurement without breaking the live link. Insertion loss at the monitor port is 23 dB. The monitor port is fixed on every SCMD-8B configuration and is not affected by the housing or wavelength band selection.
SCMD-8B ships in three housing options: mini-LGX, LGX, or 19-inch 1U rack mount. The housing determines how the unit mounts into existing patch panel infrastructure. Wavelength band selection is made independently at order time; the optical path and monitor port are identical across all three housing options.
For paired-unit ordering guidance, wavelength band confirmation, or additional configuration options, contact our sales team.
Frequently Asked Questions
Does the SCMD-8B need a matching SCMD-8A at the far end of the link?
Yes. The SCMD-8B is the Side B half of an asymmetric single-fiber CWDM pair, so a working link needs both an SCMD-8A (Side A) and an SCMD-8B (Side B), one at each end of the fiber. Running two SCMD-8B units on the same link, or leaving one end without an SCMD-8A, will not establish a working connection.
Which CWDM wavelength band does the SCMD-8B carry, and does it need to match the far end?
SCMD-8B ships in one of two ITU-T G.694.2 CWDM band builds selected at order time: 1271-1571nm or 1311-1611nm. Each build provides 8 CWDM channels, with each channel carried as a wavelength pair (16 wavelengths total spanning the band). The SCMD-8A unit at the far end of the link must be built for the same band, or the channels will not line up correctly.
Does the housing I choose for the SCMD-8B, mini-LGX, LGX, or 19 inch 1U, change its optical performance?
No. All three housing options (mini-LGX, LGX, and 19-inch 1U) share the same optical core, wavelength plan, and passband; they differ in mounting form factor only. Choose the housing to match the mounting infrastructure already in the rack; verify the exact shelf or rail requirements against the datasheet for the form factor you order.
Does the SCMD-8B include a 1310nm window port or an EXP expansion port?
No. Unlike some other CWDM mux/demux units in the EdgeOptic catalog, the SCMD-8B does not offer a 1310nm window port or an EXP expansion port as configurable or fixed options; every build ships without either.