1. OCP for Telco The challenge and the solution
OCP engineering workshop
Juha Klemola
Senior HW architect, System Design
Nokia

2. OCP for Telco The challenge and the solution
OCP Telco challenge – what is needed to make OCP ”Telco ready”?
NEBS – how to deal with requirements without over-engineering the OCP?
NEBS fire resistance solution
NEBS seismic solution
EMI shielding – Open design vs. EMI requirements
Cabling requirements – “Environmental requirements and directives”
DCM & Datacenter operations automation
Discussion

3. OCP Telco challenge – what is needed to make OCP ”Telco ready”?
Originally The OCP is not designed for:
Fulfill regulatory approvals of FCC & CE
Fulfill the spatial requirements set by old central office infrastructure
Support telecommunication equipment -48VDC power supply interface
Fulfill the harsh environmental criteria’s used with legacy Telecommunication equipment
DCM & Datacenter operations automation
Cabling requirements – “Environmental requirements and directives”

4. NEBS – how to deal with requirements without over-engineering the OCP?
Originally OCP is not designed for NEBS criteria.
Some of the NEBS requirement are conflicting with OCP design philosophy about fast deployment, cost optimization and serviceability. Thus some compromises might be need in design to avoid the over-engineering
Nokia plan is pull set of NEBS and ETSI enhancements to Nokia next OCP release and maintain compatibility to the OpenRack standard.

5. NEBS fire resistance solution for OCP
To be fully compliant the Telcordia GR-63-CORE fire resistance criteria fire resistant materials used
To solve the fire spread criteria compute sledges within the tree bay cubby designed as fire enclosures. OCP serviceability and rack standard compliancy maintained with this design.
Compute sledge closed from fronts side and Cubby from rear side with sealing kits

6. NEBS GR-63 Zone 2/4 seismic solution for OCP
Baseline Requirements :
Single rack NEBS Zone 2 with 850kg IT load
Dual rack NEBS Zone 4 with 850kg IT load

7. NEBS risk zone 2 Seismic solution for OCP
Key idea use the three bay cubby as strengthening member for the v2 rack frame
Cubby sides fixed with screw to the v2 rack vertical posts to provide additional strength
Need to introduce new mounting holes for the cubby specification

8. NEBS risk zone 2 simulation results for sigle rack (natural frequency criteria)
Natural frequency > 2 (Hz.)
Result:
Side-to-Side 5.2Hz
Front-to-Rear 8.5Hz
Conclusion:
Pass

9. NEBS risk zone 2 simulation results for sigle rack (displacement criteria)
Displacement of top of frame < 76.2 mm
Result:
Side-to-Side 46,7mm
Front-to-Rear 29.8mm
Conclusion:
Pass

10. NEBS risk zone 4 simulation results for dual racks linked (displacement criteria)
Displacement of top of frame < 76.2 mm
With screw fixed cubby in v2 rack we cannot pass the Zone 4 criteria. In addition of that additional strengthening members needed

11. NEBS risk zone 4 Seismic solution for OCP
Seismic X-bracing doors kit enables full OCP serviceability also for JBOD fans. For service actions X- bracing door can be opened without the tools
Same door for front and rear optimized for high air flow

12. EMI shielding – Open design vs. EMI requirements
To fulfill mandatory EMC conformity requirements i.e. FCC and CE. Open design need to enhanced. This important especially in CO locations data centers
Nokia is implementing the EMI shielding primarily in the compute sledge level (to fulfill same time the NEBS fire spread criteria).

13. Cabling requirements – “Environmental requirements and directives”
Cabling space is challenge in dense OCP rack:
Large scale datacenter and telecom VNF Ethernet cabling requirements are different:
Typically 1 Ethernet port/ server in datacenters and up to 4 in Telco designs
Tighter environmental requirements in telecom area (like IEC and/or UL® 1581, UL 1666 and UL 910 for large installations)
Usage of LSZH cabling is typical solution to fulfill these requirements
However usage of more flexible PVC cabling inside system and even inside one floor is allowed
Sled and three bay cubby replacement is mandatory requirement in fully cabled rack

14. Cabling requirements – “Environmental requirements and directives”
Nokia solution to manage high quality and serviceability of cabling
Select Leaf and HW management switch positions to middle of rack
Use sufficient amount of cable management accessories
Productize both PVC and LSZH cable variants to support various customer requirements

15. Nokia Data Center Manager Data Center operations automation
DC Hardware Management
Automatic HW discovery & inventory
Events, KPI monitoring & alerting
Thermal & power management
Configuration & firmware management
HW-Agnostic
Supports Airframe AND 3rd party Hardware
Servers, switches, storages, racks and facilities
Scalable Multi Data Center management
From small distributed to centralized hyperscale
Web User interface
RESTful APIs
North bound integration with cloud controllers, bare-metal environments and umbrella OSSs
South bound extensible hardware support
Built-in user programmable Analytics and Intelligent control

16. Thank you, Comments welcome