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Attaching the Optical Network Cable and Removing the 40G QSFP+ Transceiver Module

Author:Utoptical Date: 03/01/2019 SHARE

Attaching the Optical Network Cable and Removing the 40G QSFP+ Transceiver Module


The 40G QSFP+ transceiver module connects the electrical circuitry of the system with either a copper or an optical external network. The transceiver is used primarily in short reach applications in switches, routers, and data center equipment where it provides higher density than SFP+ modules.This article will focus on attaching the optical network cable and removing the 40G QSFP+ Transceiver Module.


Attaching the Optical Network Cable

Before removing the dust plugs and making any optical connections, follow these guidelines:


 1:Keep the protective dust plugs installed in the unplugged fiber-optic cable connectors and  in the transceiver optical bores until you are ready to make a connection.

 2:Inspect and clean the MPO connector or the duplex LC connector end faces just before you make any connections. See the Tip following step 2 in the next procedure for a pointer to a fiber-optic inspection and cleaning white paper.

 3:Grasp the MPO or the duplex LC connector only by the connector housing to plug or unplug a fiber-optic cable.


Note :The MPO connectors on the 40-Gigabit SR4 and CSR4 QSFP+ transceiver modules are keyed to prevent incorrect insertion


Note :The multiple-fiber push-on (MPO) connectors and the duplex LC connectors on the optical QSFP+ transceivers support network interface cables with either physical contact (PC) or ultra-physical contact (UPC) flat polished face types. The MPO and duplex LC connectors on the optical QSFP+ transceivers do not support network interface cables with an angle-polished contact (APC) face type.


To attach the optical cables ,follow the steps below :


Step 1: Remove the dust plugs from the optical network interface cable MPO connectors. Save the dust plugs for future use.


Step 2: Inspect and clean the MPO or duplex LC connector’s fiber-optic end faces.


Step 3: Remove the dust plugs from the QSFP+ transceiver module optical bores.


Step 4: Immediately attach the network interface cable MPO connector(see Figure 1)or duplex LC connector to the QSFP+ transceiver module(see Figure 2).


Figure 1- Cabling a 40-Gigabit QSFP+ Transceiver Module Equipped with an MPO Connector


Figure 2-  Cabling a 40-Gigabit QSFP+ Transceiver Module Equipped with a Duplex LC Connector


Step 5: Verify that the optical network cable is fully seated by pulling gently on the cable’s MPO or duplex LC connector boot. If the network cable disconnects, reinstall it and make sure that the cable connector is fully seated and that the connector latch engages.


Removing 40G QSFP+ Transceiver

To Remove a QSFP+ transceiver , follow the steps below:


Step 1: For optical QSFP+ transceivers, disconnect the network interface cable from the QSFP+ transceiver connector.


Step 2: For QSFP+ transceivers equipped with a bail-clasp latch (See Figure 1):


  1.  Pivot the bail-clasp down to the horizontal position.

  2.  Immediately install the dust plug into the transceivers optical bore.

  3.  Grasp the sides of the QSFP+ transceiver and slide it out of the module socket.


Step 3 :For QSFP+ transceivers equipped with a pull tab latch (See Figure 3):


a. Immediately install the dust plug into the transceiver's optical bore.


b. Grasp the tab and gently pull to release the transceiver from the socket.


c. Slide the transceiver out of the socket.


Step 4: Place the QSFP+ transceiver into an antistatic bag.


Figure 3- Removing the 40-Gigabit QSFP+ Transceiver Module



Attaching the optical cables and removing a QSFP+ transceiver by correct method can protect the optical cables and 40G transceiver from being damaged and ensuring stable performance.

If you are interested in UTOPTICAL 40G QSFP+ or full range of optical transceivers & cables ,please visit :UTOPTICAL Online Store.

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