Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 
ON THIS PAGE
 

Frequently Asked Questions

Why should I use 1.6T optics?

  • Increased capacity—1.6T optics offer twice the capacity of 800G optics, allowing for faster data transmission.

  • Higher port density—One 1.6T optic can replace two 800G optics, providing a higher port density and easier aggregation of 800G optics.

  • Compatibility and scalability—1.6T optics are compatible with both upcoming network devices and can support constantly evolving deployment scenarios. Their backward compatibility with older device allows for a phased transition.

  • Data center scenario—The high transmission speeds and network capabilities make 1.6T optics ideal for large-scale data centers.

Which 1.6T optics does Juniper offer?

See Hardware Compatibility Tool for a list of all the 1.6T optics offered by Juniper, along with their detailed specifications.

Which 1.6T optics are supported on my device?

See Hardware Compatibility Tool for a list of the supported optics for your device.

Can I use a third-party optic with my device?

We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.

CAUTION:

The Juniper Networks Technical Assistance Center (JTAC) provides complete support for Juniper-supplied optical modules and cables. However, JTAC does not provide support for third-party optical modules and cables that are not qualified or supplied by Juniper Networks. If you face a problem running a Juniper device that uses third-party optical modules or cables, JTAC may help you diagnose host-related issues if the observed issue is not, in the opinion of JTAC, related to the use of the third-party optical modules or cables. Your JTAC engineer will likely request that you check the third-party optical module or cable and, if required, replace it with an equivalent Juniper-qualified component.

Use of third-party optical modules with high-power consumption (for example, coherent ZR or ZR+) can potentially cause thermal damage to or reduce the lifespan of the host equipment. Any damage to the host equipment due to the use of third-party optical modules or cables is the users’ responsibility. Juniper Networks will accept no liability for any damage caused due to such use.

What are the form factors supported on 1.6T optics?

Juniper supports OSFP1600 transceivers, in both Integrated Heat Sink (OSFP) and Riding Heat Sink (OSFP-RHS) variants.

Juniper does not currently support the QSFP-DD1600 form factor.

What are the speeds supported on an 1.6T optic?

1.6T optics can support a range of speeds, depending upon their type. They can support:

  • A single port of 1.6 Tbps

  • Two ports of 800 Gbps

What does the name of the optic mean?

Optics follow a naming convention where the product name contains the form factor, data rates, and lane distribution of the optic. See Juniper Optical Product Numbers for a detailed example.

What is the lane distribution on 1.6T optics?

1.6T optics use 8 parallel lanes, each of which support 200 Gbps. Multiplexing occurs over multiple fiber pairs, or using a combination of fiber and wavelength multiplexing.

What are the modulation techniques supported on 1.6T optics?

1.6T optics use Pulse Amplitude Modulation 4-level (PAM4). PAM4 combines two bits into a single symbol with four amplitude levels, enabling you to transmit twice as much data. It has a high signal-to-noise ratio which requires shorter transmission distances. It requires Forward Error Correction (FEC) to handle the loss of signal integrity. You must configure FEC at both ends of the 1.6T link.

What is Clock Data Recovery (CDR)?

Clock Data Recovery is the process of extracting timing information from a data signal. The receiver uses the embedded timing information to re-time the signal and ensure accurate data retrieval and transmission. CDR helps to reduce jitter and improve signal integrity and reach.

What are the components of an 1.6T optic architecture?

1.6T (x8) optics are composed of the following:

  • 1.6T Host Platform

  • 8x200G Electrical Interface

  • PAM4 Digital Signal Processor/Clock Data Recovery (DSP/CDR)

  • Drivers (8)

  • Modulators (8)

  • 8x200G Optical Interfaces

  • Transimpedance Amplifiers (TIA) (8)

  • Photo-Detectors (8)

See 1.6T (X8) Transceiver Architecture for a detailed explanation of each component.

What are breakout capability and breakout cables?

Breakout capability is the ability to split a high-speed optical link into multiple smaller, lower-speed links. This is also called channelization. Breakout capability is crucial for optimizing the use of available bandwidth and physical infrastructure in various networking scenarios.

You can configure port speeds at the chassis level or the interface level. You can channelize an individual port, a block of ports, or a quad of ports.

Breakout cables have a single transceiver at one end and multiple transceivers at the other end. You can use breakout cables to physically split a single high-speed port to multiple lower-speed ports.

For more details, see Breakout Capability.

How is breakout/channelization supported on my device?

See Port Checker for details on channelization support for your device.

What are single-mode and multi-mode fibers?

Single-mode fibers (SMF) are designed to trasmit only one mode of an optical signal at a time. They have a core diameter of 9 microns. They have low attenuation and can support higher data rates and longer transmission distances.

Multi-mode fibers (MMF) can transmit multiple optical signals at the same time. They have a core diameter between 50 to 62.5 microns. They are easier to handle and manufacture as compared to SMF. They have higher attenuation and are used to transmit data over shorter distances.

What are the different types of cables used in 1.6T optics?

1.6T optics use direct attach cables (DAC) and active optical cables (AOC). See Cable Types and Length for details.

For a list of AOC and DAC cables supported by Juniper, see Hardware Compatibility Tool.

What are the different types of connectors used in 1.6T optics?

1.6T optical cables use MPO-12/APC, dual MPO-12/APC, and dual duplex LC/UPC connectors. See Connector Types for more details.

What is the power requirement for 1.6T optics?

OSFP and ORHS optics require 16 W to 28 W of power.

What is the difference between OSFP and OSFP-RHS optics?

OSFP-RHS is an OSFP module with a riding heat sink (RHS) instead of an integrated heat sink.

Can I plug OSFP modules into QSFP-DD ports or vice versa?

No. OSFP and QSFP-DD refer to optics with different form factors. An OSFP port supports only OSFP optics and a QSFP-DD port supports only QSFP-DD optics.

Can I plug 800G modules into 1.6T ports?

Yes, if the physical form factors are compatible.

Can I plug 1.6T modules into 800G ports?

We do not recommend plugging an 1.6T module into a 800G port. 800G optical ports cannot support the 200G per lane speeds that 1.6T ports can support.

Can there be an OSFP connector on one end of an 1.6T link and a QSFP-DD connector on the other?

Yes. OSFP and QSFP-DD connectors can interoperate with each other on the same link, provided the Ethernet media type is the same.