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ACCESS FOR TODAY. CONNECTED FOR TOMORROW.

Modernize the Network Collapsing Class5 Switches and Migrating to Fiber Based Solutions

16-August, 2018Scott McIsaac– Senior Solutions Engineer


Agenda

➢ Switch Collapse / Replacement – Overview

➢ Switch Collapse / Replacement – The Issues & More

➢ Class 5 TDM Switching – Why Collapse, Replace; The Challenges

➢ Switch Collapse – Objectives / Quantifiable Benefits

➢ Switch Collapse – Solutions

➢ Switch Replacement – Solutions

➢ Switch Collapse / Replacement – Set up, Testing, Cutover Phases

➢ Switch Collapse / Replacement – Examples

3Tellabs Confidential - All Rights Reserved


TDM Switches –

Huge, Power Hungry Machines

4

5ESS DMS100

1AESS

GTD 5

EWSD

Tellabs Confidential - All Rights Reserved


Switch Collapse / Replacement

➢ This initiative will begin the process of removing older TDM host switches from

the PSTN – similar to old MUX replacements

➢ Pairs or Multiples of like technology switches will be reduced to one host

➢ The greatest opportunities are with switches with less than 50% working

capacity

➢ A smaller newer technology Line Access Gateway (LAG) will be used to serve

the Donor office’s remaining native copper lines

➢ Strategy is to start with smaller offices and scale up as process and technology

solutions are realized – building comfort and buy in as you create and grow your project teams.

➢ This is Network Evolution, not just a TDM Switch Replacement

5

Overview


This initiative is a step forward but not a final, overall

solution for complete TDM removal



➢ There is no cost like a sunk cost with no additional revenue coming in

➢ Service Providers are positioning to move to a network that is Ethernet / IP enabled

➢ Logistical hurdles (i.e. copper & Class 5) are present that prevent complete

migration to an IP switch environment

➢ Legacy network elements do not provide for a seam-less transition or require many

legacy elements be left in place

6

The Issues




➢ Requires a need for Emergency Standalone service for intraoffice calls to

local emergency services

➢ FCC has been looking at TDM sunset for sometime but with no real solutions

to support funding

➢ What other equipment can/should be replaced while modernizing the

network?

➢ Replacing platform MUST be able to support, POTS, Coin, ISDN, Ground

Start, CLASS features, and many Special Service Circuits including xDSL

7

More Issues




➢ Lack of Support: No new parts are available because the systems are Manufacture

Discontinued and most of the original manufacturers are out of business

➢ Lack of Expertise: As personnel retire service providers are faced with significant cost

to retain or develop technical support capabilities without the manufacturer’s support

➢ Greater Liability: As systems near end of life, component and system failure rates

increase

➢ Increased Operational Expense: Relative to newer Softswitch solutions, the Class 5

switches use significantly more power, HVAC and occupy more real-estate

➢ Legacy Services Remain: Huge loss of traditional copper served lines leading to 50%

or less capacity and still need to support what PON just can’t handle today

8

Why Collapse or Replace – the Challenges



Class 5 Switch Collapse

➢ Eliminate Class 5 Switches

▪ Use for spare parts for MD’ed switches

▪ Eliminate RTU fees, CO tech experience and presence

➢ Eliminate Legacy Transport Equipment

▪ Migrating specials to D4s continues TDM deployment

➢ Evolve to an IP / Ethernet Centric Network

▪ Cost efficient

➢ Decouple voice switch upgrades from access network upgrades

• Better options for Broadband services

9

Objectives / Quantifiable Benefits



Class 5 Switch Collapse

➢ OSP Copper Elimination

➢ CO Bypass; TDM Collapse

▪ Removing Hosts and/or Remotes

➢ Reduce Power, OPEX, Real Estate Holdings, Property Tax

➢ Reduce, Reuse, Recycle Equipment Parts for the Network

➢ Depreciate A$$et$ by Retiring Equipment

▪ Class 5 Switch, D4 Channel Banks, Misc. Equipment

10

Objectives / Quantifiable Benefits



Switch Collapse Solutions

11

Class5 to Class5 – TDM to TDM

Switch Collapse

➢ Local Service Direct from Line

Aggregation Gateway

➢ Backhaul Traffic to Receiving CO

➢ Non-switched Specials “hair pin”

in Line Aggregation Gateway

➢ Switched Specials Carried by

Line Aggregation Gateway

➢ Transport Options GR303/TR008

with DS1 or transport via OCx or

GigE


Tellabs

BFAP

T

ell

a

b

s

B

F

A

P

T

ell

a

b

s

B

F

A

P

Tellabs

BFAP

Tellabs

BFAP

Receiving CO Remote CO

Tellabs

1000 LAG

Tellabs

1000 RST

Tellabs 1000

RST

Tellabs 1000

RST

Class5

Switch

Tellabs

1000 LET

IOF

TrunksService

Drops

Service

Drops

Service

Drops

Locally Non-

Switched

Specials

OCxGR-303

VIGs

Ocx / GbE VF DS0s

Copper or

Fiber fed

Switched

Specials

Class5

Switch


Switch Replacement Solutions

12

Class5 to SoftSwitch – TDM to VoIP

Switch Replacement

➢ Local Service Direct from Line

Aggregation Gateway

➢ Backhaul Traffic to Receiving CO

➢ Non-switched Specials “hair pin” in

Line Aggregation Gateway

➢ Switched Specials Carried by Line

Aggregation Gateway

➢ Transport Options GR303/TR008 with

DS1 or transport via OCx or GigE

➢ Interface to Media Gateway for VoIP

switch

➢ Requires Emergency Stand Alone

(ESA) device for local 911 calls


ES

A

ES

A

Tellabs

BFAP

T

ell

a

b

s

B

F

A

P

T

ell

a

b

s

B

F

A

P

Tellabs

BFAP

Tellabs

BFAPTellabs

BFAP

Regional CO Remote CO

Tellabs 1000

LET

Tellabs 1000

LET

Tellabs 1000

RST

Tellabs 1000

RST

Tellabs 1000

LET

Tellabs 1000

LET

Media

Gateway

Media

Gateway

Service

Drops

Service

Drops

Service

Drops

Service

Drops

Service

Drops

SoftSwitch

Locally Non-

Switched

Specials

Copper or

Fiber fed

Switched

Specials



13

Set Up Phase Considerations


Project Manager / Team established; Coordination an ABSOLUTE MUST

Switching Planning / Engineering OSP

Use LNP for NNX code or rehome

NNX

Distance between receiving and

collapsing CO

Distance from collapsing CO MDF

to OSP copper F1/F2 facilities

Universal or Integrated. If

integrated, GR-303 or TR-008

Update all provisioning, testing,

addressing, billing systems

Direct fiber or fiber via Mux

Contact Switch Vendor for switch

cut script, if existing

Plan space, power, frame, DSX,

LGX, HVAC

Inventory of services to cut over

Pre-provision receiving switch Any Special Services involved Pre-provision CO / OSP equipment

Switch OSSs involved Forecast equipment requirements Loop OSSs involved



14

Project Management Checklist Example


General Information Collapsing Switch Name

Collapsing Switch Type

Collapsing Switch Address

Collapsing CLLI

Receiving Switch Name

Receiving Switch Type

Receiving Switch Address

Receiving CLLI

OSP Engineering Contact

Switch Engineering Contact

Switch Capacity Contact

Switch Planning Contact

Project Manager Contact

Space/Power/Frame Planner

Distance between Collapsing / Receiving Switches

Planning Information TR-057 Universal

TR-008 Mode 1

TR-008 Mode 2

TMC/EOC (All but DMS)

CSC/EOC (DMS)

GR-303 Signaling (check the approp. Box)

GR-303 Concentration Ratio

Working Wired

Analog POTS #

Locally Switched

Non-Locally Switched

Coin (R-Pay) #

ISDN #

Universal Voice Grade (UVG)

Transmission Only (TO) [non-switched analog voice or data]

Digital Signal Zero-Data Port (DSO-DP)

E&M Signaling Circuit

XDSL

Existing DLCs to Re-home (Y/N)

Existing T1 #

Existing D4/D5 CBAs to Re-home (Y/N)

Existing M1/3s to Re-home (Y/N)

T1000 to have IPMI-3 Connectivity (Y/N)



➢ Line Aggregation Gateway cabled to Horizontal side of the MDF

➢ Run jumpers from assigned slot/port assignments to Ca/Prs using “Y”

cables or accepted cutover practices

➢ Verify continuity from assigned slot/port assignments to Ca/Prs

➢ Test Circuits from Receiving CO Switch to Collapsing CO LET Bay over

GR-303 VIG / TR-008 IG

➢ Throw circuits back to Collapsing Switch each night

➢ Verify existing customers still work each night

➢ Update databases

15

Testing Phase Considerations




➢ Cut and Remove jumpers from Collapsing Switch LEs to Ca/Prs

➢ Verify service is working from Receiving Switch to Collapsing Ca/Prs

➢ Permanently Cross connect Line Aggregation Gateway at Remotes to

CO Line Aggregation Gateway bay

➢ Verify service is working from Receiving Switch to Collapsing Remotes

➢ Verify test capability from Receiving Switch to Collapsing CO Line

Aggregation Gateways

➢ Update all databases

16

Cutover Phase Considerations



NG-DLC / MSAPOSP to IOF Existing Configurations

17OSP

Class5 Switch

Analog

OE

Local CO

DS0

DS1

Copper or fiber fed

LET

D4 CBA

Pair

Gain

D

S

X

-

1

RST

M

D

F

GR303

VIGs

RST

TDM Network

OCx

DS1

Integrated Specials

IOF Network

DS1

DS0

LET RSTTR008

IGs

LET

TR057

Universal



DMS1 Urban Collapse – Direct Feed

18

Krone/66 Type

Blocks

DMS1 Urban

RSC

DS1 DS0

DMS100

Switch

Host CO

DS1

Copper

Fed

F1

Facility

F2

FacilityCabinet

Krone/66 Type

Blocks

DMS1 Urban

RSC

DS1

DMS100

Switch

Host CO

DS1

Copper

Fed

F2

Facility

Cabinet

DS0

M

D

F

DS0

F1

Facility

Tellabs

BFAP

Tellabs

BFAP

Existing Configuration

Final Configuration


Fiber

Fed

OC3


PSTN Legacy Collapse

19

OSP

M

D

F

DMS RSLE Switch

DS1DS0

Collapsing CO

DMS10 Switch

Host CO Ca/Pr

DS1

D

S

X

-

1

D

S

X

-

1

Fox T-

Hub

Fiber

Fed

Fox T-

Hub

OSP

Fiber

Fed

DMS RSLE Switch

DS1

Collapsing CO

DMS10 Switch

Host CO

Ca/Pr

DS0LETRST

DS0

LGX

Tellabs

BFAP

LGX

Tellabs

BFAP

OC3

M

D

F

Existing Configuration – POTS Only with Async Mux

Final Configuration



PSTN Legacy Replacement

Existing Configuration – ISDN Only

20

OSP

M

D

F

Siemens EWSD

Switch

Analog OE

Collapsing COCa/Pr

OSP

Siemens DCO

RNS Switch

Collapsing CO

Ca/Pr

DS0LET

Tellabs

BFAP

GR303

VIGs

DS1

Media

Gateway

to

SoftSwitch

LGX

Copper or fiber fed

COT RT

D4 CBA

M

D

F

Existing ConfigurationFinal Configuration



Tellabs

1000 RST

Kellyburg

Tellabs

1000 RST

Langdon

Tellabs

1000 RST

Slacks Run

DCO

RLS

Ralston

Tellabs

1000 LET

Tellabs

1000 LET

Switch Collapse Project:

Existing Layout – Eliminating DCO Switches

21

DCO

RLS

Rose Valley

Tellabs

1000

Green

Mountain

Tellabs

1000

Pleasant

Valley

DCO

RLS

Trout Run

DCO

RLS

Cogan

Station

DCO

RLS

Fry

DCO

RLS

Quiglleville

Tellabs

1000 LET

Tellabs

1000 RST

Texas Creek

Tellabs

1000 RST

Landon

Tellabs

1000 RST

Beach Grove

Tellabs

1000 RST

Cogan House

DCO

RLS

Brookside

Tellabs

1000 LET

Tellabs

1000 RST

Warrensville

Tellabs

1000 RST

Reeder

Road

DCO

RLS

Huntersville

DCO

RLS

Millersville

Tellabs

1000 RST

Little Bear

Creek

Tellabs

1000 RST

Chaapel

Mountain

Tellabs

1000 RST

Murray Run

Tellabs

1000 RST

Dutchtown

Tellabs

1000 RST

Slaughen

White

Tellabs

1000 LET

Tellabs

1000 LET

Tellabs

1000 LET

Loyalsock

Main

DCO

Host

Tellabs

1000 LET

DCO

RLS

Charles

Tellabs

1000 RST

Heim Hill

Tellabs

1000 RST

Clarence Fry

DCO

RLS

Loyalsock

South

Tellabs

1000 LET

Tellabs

1000 LET

Tellabs

1000 LET


Tellabs

1000 RST

Proctor

Tellabs

1000 RST

Lower Manor

Tellabs

1000 RST

Wallis Run

DCO

RLS

Barbours

Tellabs

1000 LET

Tellabs

1000 LET

1 Remote, 308 Lines

1 Remote, 488 Lines

1 Remote, 371 Lines2 remotes, 1062 Lines

5 Remotes, 1199 Lines 1 host, 2 remotes, 1936 Lines


Tellabs

1000 RST

Kellyburg

Tellabs

1000 RST

Langdon

Tellabs

1000 RST

Slacks Run

Ralston

Tellabs

1000 LET

Tellabs

1000 LET

Switch Collapse Project:

Final Layout

22

Tellabs

1000 RST

Texas Creek

Tellabs

1000 RST

Landon

Tellabs

1000 RST

Beach Grove

Tellabs

1000 RST

Cogan House

Brookside

Tellabs

1000 LET

Tellabs

1000 RST

Proctor

Tellabs

1000 RST

Lower Manor

Tellabs

1000 RST

Wallis Run

Barbours

Tellabs

1000 LET

Tellabs

1000 LET

Tellabs

1000 RST

Warrensville

Tellabs

1000 RST

Reeder

Road

Huntersville

Millersville

Tellabs

1000 RST

Little Bear

Creek

Tellabs

1000 RST

Chaapel

Mountain

Tellabs

1000 RST

Murray Run

Tellabs

1000 RST

Dutchtown

Tellabs

1000 RST

Slaughen

White

Tellabs

1000 LET

Tellabs

1000 LET

Loyalsock

Main

Tellabs

1000 LET

Charles

Tellabs

1000 RST

Heim Hill

Tellabs

1000 RSTClarence Fry

Tellabs

1000 LET

Loyalsock

South

Tellabs

1000 LET

Tellabs

1000 RST

Tellabs

1000 RST

Tellabs

1000 RST

Rose Valley

Tellabs

1000 RST

Green

Mountain

Tellabs

1000 RST

Pleasant

Valley

Trout Run

Cogan

Station

Fry

Quiglleville

Tellabs

1000 LET

Tellabs

1000 LET

Tellabs

1000 RST

Tellabs

1000 RST

Tellabs

1000 RST

Tellabs

1000 RST

DMS100

Host

Selinsgrove

Tellabs

1000 LET


1 – Host Switch

12 – Remote Switches

5,364 – Lines Cut

308 Lines

488 Lines

371 Lines 1062 Lines

1199 Lines 1936 Lines



➢ Eliminates 40+ year old equipment

➢ Modernizes the network in preparation for TDM elimination and full IP-Centric deployments

➢ Reduces OPEX, HVAC, floor space and carbon footprint

➢ Requires multi-departmental coordination for a successful cutover

23

Summary



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