From The Clean Room to the Great Outdoors: Deploying Telecoms Equipment in hostile Environments presented by Ronan Kelly - ADTRAN.

1. © 2015 ADTRAN, Inc. All rights reserved. 1
From The Clean Room to the Great Outdoors
Deploying Telecoms Equipment in hostile Environments

2. © 2015 ADTRAN, Inc. All rights reserved. 2
The Journey
Exchange Deployment
Technology: ADSL2+
Homes Passed: 3,000 – 40,000
Service offering ≤ 24Mbps
FTTCabinet Deployment
Technology: VDSL2
Subscribers: 100 – 400
Service offering ≤ 100Mbps
FTT-DP / FTTBasement
Technology: G.fast
Subscribers: 1 - 96
Service offering ≤ 500Mbps
High
Low
Cost Per Subscriber
Time to Market
Phase 1 Phase 2 Phase 3
Fast SuperFast UltraFast

3. © 2015 ADTRAN, Inc. All rights reserved. 3
The Clean Room
 Air Quality Control
- ISO 14644-1 & ASHRAE standards
- Particles per Cubic Meter
- Humidity levels
- Temperature
 Power
- Source Diversity
- Robust Failover Procedures
 Communications
- Diverse building entry for critical links
- Diverse in-building routing of cables
 Security
- 24x7 Manned or Automated Security
- Zero Public Access
Key Attributes of the Local Exchange

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First Steps Outside
 The Mini Clean Room
- Closed System - Microclimate*
 Heat Exchanger to exhaust heat
 No Direct airflow though equipment
 Matching Equipment
- The same Active broadband
equipment as in the Exchange
- The same passive equipment
 Localised Power Solution
- Usually Single AC supply
- Local Rectifiers
- Local Backup Batteries
 Relative Security
- Locked and Alarmed Doors
* Some Choose Forced Air Cooled Open Systems

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Leaving the Goldilocks Zone – OSP DSLAM
 Initially Developed for the Under-Served
- Rural – Low Density Broadband
- Minimal Deployment & Operational Costs
- Single Technician Turn-up
- Flexible Deployment Options
 Purpose Built for Extremes
- Self Contained Microclimate
- Broad Operating Temperature range
- Hermetically Sealed
- Completely Solid State
- Zero Routine Maintenance
- Ballistics Grade Enclosures
 Established Option for VDSL2 Roll-out
- Reduced Time to Market
- Lower Operational Costs
- Reduced Dependencies on Utilities & Fibre Backhaul
1st Gen 1124
(ADSL)
2nd Gen 1148
(ADSL2+)
3rd Gen Solutions
(ADSL2+/VDSL2)
4th Gen Solutions
(VDSL2 w/ vectoring)
G.fast DPUs

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We’re Not in Kansas Anymore
 Temperatures
- Operating range -40C to +70C
- Substantial Daily Temperature Swings
- Solar Loading
- Convection Cooling
 Power
- Dirty Power Sources
- Frequent Micro Outages
- Exposure to lightening Strikes
 Security
- Out of Reach Pole Mounting
- Out of Sight Chamber Mounting
- Passive Cabinet Exterior Mounting

7. © 2015 ADTRAN, Inc. All rights reserved. 7
What Have We Learned?
 View an OSP as a System
- The Power, Uplinks, Fixtures, Cables
- The Weakest Link can Down the System
 A Power glitch can equal a reboot ~10 Minute TV interruption
 Factor in System Testing Margin
- Exceeding the System Rating Regardless of Component
Specifications
 Component Suitability
- Operating Temperatures Push the Limits of Most
- Temperature swings reveal any weaknesses
- Broader Recognition of the New Extremes Required from
Component Vendors

8. © 2015 ADTRAN, Inc. All rights reserved. 8
97.70%
99.98%
96.50%
97.00%
97.50%
98.00%
98.50%
99.00%
99.50%
100.00%
100.50%
X5R (85C) X7R (125C)
Reliabilityin%
Ceramic Capacitor
Ceramic Capacitor Reliability
Improvement
• Initial Design Used a X5R (85C) Ceramic Capacitor in VDSL DSLAM
• Unit Operating Specification -40C to +70C
• Early Customer Returns Data Dictated the need to use X7R (125C)
An Example of Tailored Component Selection

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What Have We Recognised?
 Collaboration Between Procurement and R&D
- Standardising on the minimum range of components not always possible
- Physical Dimensions and Temperature considerations more pronounced
in the cramped space inside an OSP
 Supply Chain Control
- When your Supplier’s Supplier Makes Material or Process Changes
 Is Corrosion Resistance Compromised?
 Is Operating Temperature Range Reduced?
 Is the Thermal Output Increased
- Individual Application Testing of Each Alternative Component

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What Have We Changed Ourselves?
 Supply Chain Change Control
- Stringent Supplier Change Control Procedures
- System Focused Component Selection Criteria
- Tight Collaboration Between Procurement and Engineering
 Assembly Quality Control
- Criteria for Material Selection for Connectors, Adhesives, and Solders
- Adopted Stringent Controls over Component Dimensions
 Flexibility vs Reliability
- Field Service Options Compromise Enclosure Integrity
 Failures from Incorrect Closure Outweigh Component Failures
 Component Quality Improvements Can Negate Field Replacement
Requirements

11. © 2015 ADTRAN, Inc. All rights reserved. 11
What Have We Shared?
 Increased Customer Education on Deployment Risks
 “Any Colour you like so long as it’s White”
 Painting Green or Brown significantly alters performance under Solar Load conditions.
 Mounting locations can Impact Airflow
 Enclosed Spaces Impede Heat Exhaust
 Covers, Lids, Camouflage & Mounting Direction
can all prevent Convection
 Cable Routing & Securing
 Avoid Sheathing Abrasion
 Prevent Water ingress
 Reduce Cable Related Failures
 Corrosion Awareness
 Salt Fog in Coastal Regions Attacks Every Weak Point
 Standing Salt Water in Chambers - Common in Snow Prone Regions
 Directly Buried Equipment at High Risk From Corrosive Materials
 UV Damage Will Quickly Destroy Inferior Materials

12. © 2015 ADTRAN, Inc. All rights reserved. 12
Key Takeaways
 G.fast will Demand OSP Deployment due to Proximity and Economic
Constraints
 OSPs Bring the Required Expediency and Predictability To Deployment
Schedules
 Tight Supply Chain Controls Critical to Preventing Unwanted Post
Deployment Surprises
 When Installed per the Guidelines OSPs Deliver Exceptional Customer
Experiences for Decades
 We Hope Our Experience Aids Your Journey out of the Clean Room