# CEI-4x10G-SFP+

Network Adapter Card for Express-ID7

User’s Guide

![Green printed circuit board with various electronic components and connectors (no readable text or symbols)](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/883eb1363831c2d18e237f4a5b3ce97b45fbd375f14b4a84c2b3b36806646b8f.jpg)

Revision History

<table><tr><td>Revision</td><td>Description</td><td>Date</td><td>Author</td></tr><tr><td>0.1</td><td>Preliminary release</td><td>2023-12-21</td><td>CC</td></tr></table>

# Preface

# Disclaimer

Information in this document is provided in connection with ADLINK products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in ADLINK´s Terms and Conditions of Sale for such products, ADLINK assumes no liability whatsoever, and ADLINK disclaims any express or implied warranty, relating to sale and/or use of ADLINK products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. If you intend to use ADLINK products in or as medical devices, you are solely responsible for all required regulatory compliance, including, without limitation, Title 21 of the CFR (US), Directive 2007/47/EC (EU), and ISO 13485 & 14971, if any. ADLINK may make changes to specifications and product descriptions at any time, without notice.

# Environmental Responsibility

ADLINK is committed to fulfil its social responsibility to global environmental preservation through compliance with the European Union's Restriction of Hazardous Substances (RoHS) directive and Waste Electrical and Electronic Equipment (WEEE) directive. Environmental protection is a top priority for ADLINK. We have enforced measures to ensure that our products, manufacturing processes, components, and raw materials have as little impact on the environment as possible. When products are at their end of life, our customers are encouraged to dispose of them in accordance with the product disposal and/or recovery programs prescribed by their nation or company.

![The image features a yellow triangular warning symbol with a thick black border. Inside the triangle is a large, centered black exclamation point. The sign is flanked on the left and right by vertical black bars.](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/896466290ebf84ed75bb359079fa0904c0d962b27288c408b84c86516760701a.jpg)

California Proposition 65 Warning: This product can expose you to chemicals including acrylamide, arsenic, benzene, cadmium, Tris(1,3- dichloro-2-propyl)phosphate (TDCPP), 1,4-Dioxane, formaldehyde, lead, DEHP, styrene, DINP, BBP, PVC, and vinyl materials, which are known to the State of California to cause cancer, and acrylamide, benzene, cadmium, lead, mercury, phthalates, toluene, DEHP, DIDP, DnHP, DBP, BBP, PVC, and vinyl materials, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

![The image displays a line drawing of a wheeled waste bin. It is crossed out by a large 'X' symbol. Below the bin is a thick, solid black horizontal bar.](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/efd53f7af9eb130653b4b4a0c10bf36014d1a78b50d595e971ef409edd2a080d.jpg)

# Trademarks

Product names mentioned herein are used for identification purposes only and may be trademarks / registered trademarks of respective companies.

# Copyright © 2023 ADLINK Technology Incorporated

This document contains proprietary information protected by copyright. All rights are reserved. No part of this manual may be reproduced by any mechanical, electronic, or other means in any form without prior written permission of the manufacturer.

# Safety Instructions

For user safety, please read and follow all Instructions, WARNINGs, CAUTIONs, and NOTEs marked in this manual and on the associated equipment before handling/operating the equipment.

Read these safety instructions carefully.

Keep this manual for future reference.
• Read the specifications section of this manual for detailed information on the operating environment of this equipment.
• Turn off power and unplug any power cords/cables when installing/mounting or un-installing/removing equipment.
• To avoid electrical shock and/or damage to equipment:
Keep equipment away from water or liquid sources;
Keep equipment away from high heat or high humidity;
• Keep equipment properly ventilated (do not block or cover ventilation openings);
• Make sure to use recommended voltage and power source settings;
• Always install and operate equipment near an easily accessible electrical socket outlet;
• Secure the power cord (do not place any object on/over the power cord);
• Only install/attach and operate equipment on stable surfaces and/or recommended mountings;
• If the equipment will not be used for long periods of time, turn off the power source and unplug the equipment.

# Conventions

The following conventions may be used throughout this manual, denoting special levels of information

![The image displays a simple icon of a document or page. It features a thick red outline forming a rectangle with the bottom-right corner folded over. Inside the outline, two horizontal red lines are centered vertically, resembling text lines on a page. The background within the icon is white.](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/8071426988fb512f38a522524dcb0e4f6b550e6ea70c827332d83f0420a89b53.jpg)

Note: This information adds clarity or specifics to text and illustrations.

![The image displays a standard warning icon featuring a yellow triangle with rounded corners centered on a white background. Inside the triangle is a black exclamation mark.](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/4fb226fb826ab8964ccd9c53679695940dc592c3c2171576c3095e17a92fd331.jpg)

Caution: This information indicates the possibility of minor physical injury, component damage, data loss, and/or program corruption.

![The image displays a standard warning symbol consisting of a red triangle with rounded corners and a thin white border. Inside the triangle, centered, is a large white exclamation point. There is no text present in the image.](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/88361a91fba811738de2c6ef0216292450d0015c755079734825ae2cfc91c0a9.jpg)

Warning: This information warns of possible serious physical injury, component damage, data loss, and/or program corruption.

# Getting Service

Ask an Expert: https://www.adlinktech.com/en/Askanexpert

# ADLINK Technology, Inc.

No. 66, Huaya 1st Rd., Guishan District, Taoyuan City 333411, Taiwan

Tel: +886-3-216-5088

Fax: +886-3-328-5706

Email: service@adlinktech.com

# Ampro ADLINK Technology, Inc.

6450 Via Del Oro, San Jose, CA 95119-1208, USA

Tel: +1-408-360-0200

Toll Free: +1-800-966-5200 (USA only)

Fax: +1-408-600-1189

Email: info@adlinktech.com

# ADLINK Technology (China) Co., Ltd.

300 Fang Chun Rd., Zhangjiang Hi-Tech Park, Pudong New Area, Shanghai, 201203, China

Tel: +86-21-5132-8988

Fax: +86-21-5132-3588

Email: market@adlinktech.com

# ADLINK Technology GmbH

Hans-Thoma-Strasse 11, D-68163 Mannheim, Germany

Tel: +49-621-43214-0

Fax: +49-621 43214-30

Email: emea@adlinktech.com

Please visit the Contact page at www.adlinktech.com for information on how to contact the ADLINK regional office nearest you.

# Table of Contents

Revision History ..

Preface ..

List of Figures .. . 8

1. Introduction .. C
2. Specifications.. .10

2.1. Interface.. ... 10
2.2. 10GbE PHY ... ... 10
2.3. Dimensions... ... 11
2.4. Operating Temperature.. .11
2.5. Specification Compliance... ... 12
2.6. I/O Expander & EEPROM .. ..12

3. Block Diagram... .13
4. Pinout and Signal Descriptions ... .14

4.1. Input Interface Definitions .... ... 14

5. Module Interfaces and Configuration .. .17

5.1. Connector and LED Locations .. ..17
5.2. LED Indicators .. ... 18
5.3. 10GbE Adaptor Card Installation... ..19

6. Mechanical.... ..20

# List of Figures

Figure 1 – CEI-4x10G-SFP+ function diagram .. .13

Figure 2 – CEI-4x-SFP+ feature locations ........ ...17

Figure 3 – CEI-4x10G-SFP+ mechanical dimensions.............. ...20

# 1. Introduction

The ADLINK CEI-4x10G-SFP+ card is a 10GbE network adapter card that is dedicated to Express-ID7 module. Delivering 10Gbps network within the guidelines of PICMG COM.0 R3.1 specification, the adapter card converts up to four 10GBASE-KR interfaces, and related CEI sideband signals, to four 10GbE SFP+ transceivers, through Intel C827IM optical fiber PHY.

The CEI-4x10G-SFP+ card can only be used with ADLINK Express-ID7 COM Express module (PICMG COM.0 R3.1 Type 7 compliant)

Utilizing the CEI-4x10G-SFP+ card with an Express-ID7 module and Express-BASE7 reference carrier board, you can quickly emulate the functionality of your end product for software development and hardware verification. Applications include entry-level switch, cloud storage platforms, communications servers, and more.

# 2. Specifications

# 2.1. Interface

# Input

Up to 4x 10GBASE-KR and related CEI sideband signals from a dedicated COM Express Type 7 module through a 164-pin edge connector (PCIe x16 slot PCIEKR on Express-BASE7)

# Output

Up to 4x 10GbE optical fiber signals via 4x SFP+ transceivers

# 2.2. 10GbE PHY

# PHY

Intel C827IM optical fiber PHY

Converts 10GBASE-KR and sideband signals to 10GBASE-SR, 10GBASE-LR.

# PHY Firmware on SPI ROM

Dedicated ROM for storing PHY firmware

# ID EEPROM (AT24CS32 EEPROM)

I2C-based device, identifies the capabilities of the attached site. This allows the firmware to configure the attached PHY(s) and necessary I/O modes.

![COM Express module\nExpress-ID7\n10G controller FW\nintegrated into BIOS SPI ROM\nIntel 10G LAN controller\nintegrated into Ice Lake-D SOC\n10GbE adaptor card\nCopper or SFP+\nPHY Copper\nPHY FW stored\n10G_KR_TX/RX Side band\nID EEPROM talk to 10G controller, define the usage (KR or Optical or Copper)](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/64ab60e7612f1054df41b4d388512b85bf5e79d96ad533eb82afb2552eecfcaf.jpg)

# 2.3. Dimensions

168 mm x 112 mm (PCB only, including edge connector)

# 2.4. Operating Temperature

0°C to 55°C

# 2.5. Specification Compliance

PICMG COM.0 Rev 3.1 Type 7

# 2.6. I/O Expander & EEPROM

Additional expander and EEPROM not mentioned are described as below:

# PCA9575 IO Expander

I2C-based device, de-serialized for low speed sideband I/O, including interrupt, reset, etc.

# PCA9685 LED Ctrl

I2C-based device, controls LED indication

# 3. Block Diagram

![**Labeled Blocks:**\n*   Golden Finger\n*   GPIO Expander 1 (PCA9575PW2_NXP)\n*   EEPROM (AT24C32E_MICROCHIP)\n*   GPIO Expander 2 (PCA9685PW_NXP)\n*   LAN PHY (C827_INTEL)\n*   SFP+ Connector\n\n**Connections:**\n*   **Golden Finger ↔ LAN PHY**:\n    *   10GBASE-KR x4\n    *   CEI_MDC\n    *   CEI_MDIO\n*   **Golden Finger → GPIO Expander 1**:\n    *   CEI_RST_N\n    *   CEI_I2C_SCL\n    *   CEI_I2C_SDA\n*   **GPIO Expander 1 → Golden Finger**:\n    *   CEI_INT_N\n*   **GPIO Expander 1 → LAN PHY**:\n    *   PHY_RESET_N\n    *   PHY_INY_N\n*   **LAN PHY → GPIO Expander 1**:\n    *   VMC_ADDRESS_0\n    *   VMC_ADDRESS_1\n    *   VMC_ADDRESS_2\n    *   VMC_ADDRESS_3\n*   **GPIO Expander 1 ↔ SFP+ Connector**:\n    *   Sideband Signal\n*   **EEPROM → LAN PHY**:\n    *   ID_WP\n*   **Golden Finger → EEPROM** (via shared I2C lines):\n    *   CEI_I2C_SCL\n    *   CEI_I2C_SDA\n*   **Golden Finger → GPIO Expander 2** (via shared I2C lines):\n    *   CEI_I2C_SCL\n    *   CEI_I2C_SDA\n*   **GPIO Expander 2 ↔ SFP+ Connector**:\n    *   Sideband Signal (LED Signal) x4\n*   **LAN PHY ↔ SFP+ Connector**:\n    *   SFI x4](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/fc3e45c25549204c63b0997b858022366a0aee617e06f86690f990c4922e1c98.jpg)

Figure 1 – CEI-4x10G-SFP+ function diagram

# 4. Pinout and Signal Descriptions

# 4.1. Input Interface Definitions

The table below is a comprehensible list of all signal pins supported on the 164-pin Edge connector of CEI-4x10G-SFP+ card. Signal names follow the PICMG COM.0 R3.1 specification. Signals described in the specification but not supported on the CEI-4x10G-SFP+ card are marked with strikethrough STRIKETHROUGH.

![B1](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/fe493227ccb2bab803b0f05f873f1173fc6729581ed7e10c8adc140b4e74d33f.jpg)

Row B
Row A

<table><tr><td>Pin</td><td>Name</td><td>Pin</td><td>Name</td></tr><tr><td>B1</td><td>12V</td><td>A1</td><td>NC</td></tr><tr><td>B2</td><td>12V</td><td>A2</td><td>12V</td></tr><tr><td>B3</td><td>12V</td><td>A3</td><td>12V</td></tr><tr><td>B4</td><td>GND</td><td>A4</td><td>GND</td></tr><tr><td>B5</td><td>NC</td><td>A5</td><td>NC</td></tr><tr><td>B6</td><td>NC</td><td>A6</td><td>NC</td></tr><tr><td>B7</td><td>GND</td><td>A7</td><td>GND</td></tr><tr><td>B8</td><td>CEI_SDA</td><td>A8</td><td>NC</td></tr><tr><td>B9</td><td>CEI_SCL</td><td>A9</td><td>NC</td></tr><tr><td>B10</td><td>3V3SB (TBC)</td><td>A10</td><td>GND</td></tr><tr><td>B11</td><td>3V3SB (TBC)</td><td>A11</td><td>CB_RST-L (TBC)</td></tr><tr><td>B12</td><td>NC</td><td>A12</td><td>GND</td></tr><tr><td>B13</td><td>NC</td><td>A13</td><td>NC</td></tr><tr><td>B14</td><td>NC</td><td>A14</td><td>NC</td></tr><tr><td>B15</td><td>NC</td><td>A15</td><td>GND</td></tr></table>

Row B
Row A

<table><tr><td>Pin</td><td>Name</td><td>Pin</td><td>Name</td></tr><tr><td>B16</td><td>NC</td><td>A16</td><td>NC</td></tr><tr><td>B17</td><td>CEI_INT#</td><td>A17</td><td>NC</td></tr><tr><td>B18</td><td>GND</td><td>A18</td><td>GND</td></tr><tr><td>B19</td><td>NC</td><td>A19</td><td>NC</td></tr><tr><td>B20</td><td>NC</td><td>A20</td><td>GND</td></tr><tr><td>B21</td><td>GND</td><td>A21</td><td>NC</td></tr><tr><td>B22</td><td>GND</td><td>A22</td><td>NC</td></tr><tr><td>B23</td><td>10G_KR_RX3+</td><td>A23</td><td>GND</td></tr><tr><td>B24</td><td>10G_KR_RX3-</td><td>A24</td><td>GND</td></tr><tr><td>B25</td><td>GND</td><td>A25</td><td>10G_KR_TX3+</td></tr><tr><td>B26</td><td>GND</td><td>A26</td><td>10G_KR_TX3-</td></tr><tr><td>B27</td><td>10G_KR_RX2+</td><td>A27</td><td>GND</td></tr><tr><td>B28</td><td>10G_KR_RX2-</td><td>A28</td><td>GND</td></tr><tr><td>B29</td><td>GND</td><td>A29</td><td>10G_KR_TX2+</td></tr><tr><td>B30</td><td>10G_PHY_RST_01 (TBC)</td><td>A30</td><td>10G_KR_TX2-</td></tr><tr><td>B31</td><td>CEI_RST#</td><td>A31</td><td>GND</td></tr><tr><td>B32</td><td>GND</td><td>A32</td><td>CEI_SDA (TBC)</td></tr><tr><td>B33</td><td>10G_KR_RX1+</td><td>A33</td><td>CEI_SCL (TBC)</td></tr><tr><td>B34</td><td>10G_KR_RX1-</td><td>A34</td><td>GND</td></tr><tr><td>B35</td><td>GND</td><td>A35</td><td>10G_KR_TX1+</td></tr><tr><td>B36</td><td>GND</td><td>A36</td><td>10G_KR_TX1-</td></tr><tr><td>B37</td><td>NC</td><td>A37</td><td>GND</td></tr><tr><td>B38</td><td>NC</td><td>A38</td><td>GND</td></tr><tr><td>B39</td><td>GND</td><td>A39</td><td>CEI_MDIO</td></tr><tr><td>B40</td><td>GND</td><td>A40</td><td>CEI_MDC</td></tr><tr><td>B41</td><td>10G_KR_RX0+</td><td>A41</td><td>GND</td></tr><tr><td>B42</td><td>10G_KR_RX0-</td><td>A42</td><td>GND</td></tr><tr><td>B43</td><td>GND</td><td>A43</td><td>10G_KR_TX0+</td></tr><tr><td>B44</td><td>GND</td><td>A44</td><td>10G_KR_TX0-</td></tr><tr><td>B45</td><td>10G_SDP3</td><td>A45</td><td>GND</td></tr><tr><td>B46</td><td>10G_SDP2</td><td>A46</td><td>GND</td></tr><tr><td>B47</td><td>GND</td><td>A47</td><td>NC</td></tr><tr><td>B48</td><td>10G_SDP1</td><td>A48</td><td>CEI_PRSNT#</td></tr><tr><td>B49</td><td>GND</td><td>A49</td><td>GND</td></tr></table>

Row B
Row A

<table><tr><td>Pin</td><td>Name</td><td>Pin</td><td>Name</td></tr><tr><td>B50</td><td>NC</td><td>A50</td><td>10G_SDP0</td></tr><tr><td>B51</td><td>NC</td><td>A51</td><td>GND</td></tr><tr><td>B52</td><td>GND</td><td>A52</td><td>NC</td></tr><tr><td>B53</td><td>GND</td><td>A53</td><td>NC</td></tr><tr><td>B54</td><td>NC</td><td>A54</td><td>GND</td></tr><tr><td>B55</td><td>NC</td><td>A55</td><td>GND</td></tr><tr><td>B56</td><td>GND</td><td>A56</td><td>NC</td></tr><tr><td>B57</td><td>GND</td><td>A57</td><td>NC</td></tr><tr><td>B58</td><td>NC</td><td>A58</td><td>GND</td></tr><tr><td>B59</td><td>NC</td><td>A59</td><td>GND</td></tr><tr><td>B60</td><td>GND</td><td>A60</td><td>NC</td></tr><tr><td>B61</td><td>GND</td><td>A61</td><td>NC</td></tr><tr><td>B62</td><td>NC</td><td>A62</td><td>GND</td></tr><tr><td>B63</td><td>NC</td><td>A63</td><td>GND</td></tr><tr><td>B64</td><td>GND</td><td>A64</td><td>NC</td></tr><tr><td>B65</td><td>GND</td><td>A65</td><td>NC</td></tr><tr><td>B66</td><td>NC</td><td>A66</td><td>GND</td></tr><tr><td>B67</td><td>NC</td><td>A67</td><td>GND</td></tr><tr><td>B68</td><td>GND</td><td>A68</td><td>NC</td></tr><tr><td>B69</td><td>GND</td><td>A69</td><td>NC</td></tr><tr><td>B70</td><td>NC</td><td>A70</td><td>GND</td></tr><tr><td>B71</td><td>NC</td><td>A71</td><td>GND</td></tr><tr><td>B72</td><td>GND</td><td>A72</td><td>NC</td></tr><tr><td>B73</td><td>GND</td><td>A73</td><td>NC</td></tr><tr><td>B74</td><td>NC</td><td>A74</td><td>GND</td></tr><tr><td>B75</td><td>NC</td><td>A75</td><td>GND</td></tr><tr><td>B76</td><td>GND</td><td>A76</td><td>NC</td></tr><tr><td>B77</td><td>GND</td><td>A77</td><td>NC</td></tr><tr><td>B78</td><td>NC</td><td>A78</td><td>GND</td></tr><tr><td>B79</td><td>NC</td><td>A79</td><td>GND</td></tr><tr><td>B80</td><td>GND</td><td>A80</td><td>NC</td></tr><tr><td>B81</td><td>NC</td><td>A81</td><td>NC</td></tr><tr><td>B82</td><td>NC</td><td>A82</td><td>GND</td></tr></table>

# 5. Module Interfaces and Configuration

This chapter describes connectors, LEDs, and switches that are used on the CEI-4x10G-SFP+ adapter card.

# 5.1. Connector and LED Locations

![SFP+ 1x2 Cage\nSFP+ 1x2 Cage\nReserved Connector\nADLINK\n10G Optical C827 Card\n51-79021-0A10\nS/N\nCE\nSEC\n319203\nR4A\nDAV-D](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/59d5dfca71c30ad44e818069d77292b2a376a7332bca3d1191600a54d2c1ec28.jpg)

Figure 2 – CEI-4x-SFP+ feature locations

# 5.2. LED Indicators

There are two status LEDs for each 10GBASE-T port

![Port 0 LINK_Green\nPort 1 LINK_Green\nPort 2 LINK_Green\nPort 3 LINK_Green\nPort 0 LINK_MAX_Yellow\nPort 0 ACT_Green\nPort 1 LINK_MAX_Yellow\nPort 1 ACT_Green\nPort 2 LINK_MAX_Yellow\nPort 2 ACT_Green\nPort 3 LINK_MAX_Yellow\nPort 3 ACT_Green](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/b6a0c07f24077596f28f09f7e00b26692d6c6f8fbeb0bef5f8259a9c8fc170ba.jpg)

<table><tr><td>Function</td><td>LED Color</td><td>LED State</td><td>Description</td></tr><tr><td colspan="4"></td></tr><tr><td rowspan="3">Speed</td><td rowspan="3">Green / Yellow</td><td>Off</td><td>TBC</td></tr><tr><td>Yellow</td><td>1 Gbps link speed</td></tr><tr><td>Green</td><td>10 Gbps link speed</td></tr><tr><td rowspan="3">Link / Active Status</td><td rowspan="3">Green</td><td>Off</td><td>No Link</td></tr><tr><td>Steady On</td><td>Link established, no activity detected</td></tr><tr><td>Blinking</td><td>Link established, activity detected</td></tr></table>

# 5.3. 10GbE Adaptor Card Installation

Below is an example (illustration purposes only) of a CEI-4x10G-SFP+ adapter card installed on an Express-BASE7 carrier board with a Type 7 Express-ID7 module.

![Close-up of a green printed circuit board with multiple electronic components and connectors (no visible text or symbols)](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/040c70020098aca79ced132728f18257dfe6eb319986226ab36061aef1164a03.jpg)

![The image displays a red icon resembling a document or page with a folded bottom-right corner. Inside the shape, there are three horizontal parallel lines stacked vertically.](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/b2c30e4e4eb6880b6011f6fb494806dfcfdf3523e881637002a9548ed1198730.jpg)

Note: If input 5VSB-to-10GbE adapter card is needed for testing purposes, a specific cable and connection are required. Please contact an ADLINK representative for details.

# 6. Mechanical

![101.80\n85.40\n3.40\n0\n4.85\n7.50 0 7.50 25.85 33.85 37.50 48.70 50.60 121.80 160.15](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/b5940601b7b96789839de024e11a5072c2a673af3ddb5408917cc4d55351ff17.jpg)

Figure 3 – CEI-4x10G-SFP+ mechanical dimensions

![The image displays a red outline icon resembling a document or page of paper. It has a rounded square shape with a folded corner at the bottom right. Inside the red border, there are two horizontal red lines centered vertically, representing text. The background is white.](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/fd8d80f58b1480174951385027a761c4af1c6fe8c4b6dd66aab784678d7e559b.jpg)

Note: All dimensions are shown in millimeters with a tolerances of ± 0.25mm unless otherwise noted.
[🔗 Link to the original document](.cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221/cei-4x10g-sfp-prelim-manual-50m-79021-1000-01-231221.pdf)