Karey Barnett

Frisco, TX, 75035

214-284-8185

karey.g.barnett@gmail.com

https://www.linkedin.com/in/kareybarnett

SUMMARY

Thorough Telecommunications Solution Architect/Engineer with extensive years of experience in

software and hardware deployments/rollouts, covering wireless and wireline technologies. Flexible selfstarter

with strong knowledge in wireless core (CDMA, 2G/GSM, 3G/WCDMA/UMTS, 4G/LTE,

VoLTE, VoIP, IMS, SIP, CSFB) and wireline core signaling. Reliable and competent with diverse

experience in design (R&D), test/verification, product management, deployment, and customer support.

  · JNCIA-JUNOS – Juniper switches/routers operating system, configuration, and monitoring

  · JNCIS-SEC – Juniper security firewalls, zones, policies, IPsec VPNs, NAT, content filtering, chassis

  · ECA-IPN – IPv4,IPv6, ATM, OSPF, IGP, BGP,MPLS, L2 VLAN, QoS, Ethernet, Smart Edge

  · ECA-MCIPN – LTE, EPC, UDP, SCTP,TCP,GTP, eNodeB, PCEF, PCRF/SAPC, MME, PGW,

SGW, HSS, SSR (BNG/BRAS), Voice over Wifi, HSDPA, WAN, LAN,PPP, RADIUS, Diameter

CERTIFICATIONS

PROFESSIONAL EXPERIENCE

ERICSSON, Inc., Plano, TX

2009 - 2015

Solution Architect II, 2012 – 2015

  · Evolved Packet Core (EPC) Solution Architect – Served as the technical solution lead and customer

interface for the deployment of 3GPP standard wireless GPRS core network elements (SGSN and

GGSN) and 3GPP EPS core network elements (MME, SGW, PGW, HSS) and software:

- Led several successful voice over LTE (VoLTE/VoIP) and CSFB deployments, and received

E-star awards from customers and Ericsson management on the jobs well done.

- Cloud - Push-to-Talk (PTT) consulting on the Kodiak/C-Spire operator solution.

- Coordinated 20+ successful EPC network upgrades without outages with teams based in

India, Mexico, USA, and Canada

- Presented 20+ pre-sales proposal/RFP cost estimates (over $4M in sales) for new EPC

hardware and software projects, and identified and presented Add-on-Sales opportunities

(over $60k in sales) above and beyond the scope of purchase orders (P.O’s).

- Designed and engineered 10+ successful triple-access (2G,3G,4G) integration, verification,

and deployment projects into customer networks: US Cellular, Newcore, OCEUS, GTA,

PTI/IT&E, C-spire, Nex-Tech, Enhanced Telecom, GCI, Plateau, etc.

- Designed and engineered successful integrations, verifications, and deployments with

switches/routers, operations support (OSS), billing (BSS), and radio access networks (RAN)

by Ericsson and 3rd (third) party equipment provided by Alcatel-Lucent (ALU), Nokia

Siemens Networks (NSN), Cisco, Mavenir (Mitel), TCS, Intrado, AMDOCs, CHR, etc.

Engineer IV (Architect), 2009 – 2012

  · Interworking with 3rd party SIP vendors - Served as the CDMA Wireless MSC R&D Design

organization's point of customer contact, subject matter expert, providing technical support and

knowledge sharing of the SIP Voice over IP (VoIP) Interop Testing/Verification (IOT), RFC, 3GPP2,

and ANSI standards, compliancies, and call flows.

- IMS MGCF solution for Verizon, Sprint: Developed use cases and the high-level design

based on 3GPP/3GPP2 and GSMA IMS standards, and customer requirements. Approved SIP

STACK/TU software layer Agile demos. Developed the compliancy to IMS 3GPP2 X.S0050

(Mg SIP interface) standard. IOT planning with IMS SIP network elements: CSCF, MTAS,

UE (mobile/client), MRFC, media gateways (MGW), media servers (MS), PBX, etc.

Karey Barnett

214-284-8185

PROFESSIONAL EXPERIENCE (continued)

NORTEL NETWORKS, Inc., Richardson, TX

1993 - 2009

Engineer IV (Architect), 2006 – 2009

  · Interworking with 3rd party SIP vendors

- SIP IOT – Traveled for face-to-face technical support of SIP/LTE planning customer

meetings, and successfully lab tested/verified 10+ SIP interface deployments with third-party

vendors: ACME Packet (Oracle), Alcatel-Lucent (ALU) (MSC, Voicemail, CRBT, and

SCP/IP products), Comverse, Nokia-Siemens-Networks (NSN), GENBAND, Real Networks,

Samsung, and Verizon (Wireless and Business).

- Migrations – Deployment support of IP-based (SIP) interfaces into the Verizon network, in

place of SS7/ISUP trunks. Technical support and problem solving of network field issues

involving Wireshark traces of SIP, UDP/IP, H.248, IPv4, Domain Name/FQDN, SDP, RTP,

and RTCP requirements for successful deployment with the Ericsson CDMA MSC.

Engineer IV (Architect), 2001 - 2009

  · CDMA Wireless MSC IOS Architect – Led the R&D Design team to interface with 3rd party

Motorola and Samsung BSC/Radio Access Network vendors on the 3GPP2 A1p SUA/SCTP/IP-based

interface and A1/A2 SS7/TDM-based interface to ensure that the correct architectural direction was

taken with new IOS features implemented.

  · CDMA Wireless MSC ISUP Architect – Key reviewer/approver of R&D software Development

Estimates (DE’s), HLDs, implementations, and compliancies for projects involving PSTN ISDN/SS7

standards: ITU Q.761-Q764, ANSI T1.113, GR-317/394, and ETSI ISUP standards.

AT&T Solutions Analyst, 2000 - 2001

  · R&D Wireline switch Single Point of Customer Contact – Presented AT&T Class 4/5 PSTN/wireline

long-distance switch software releases and cost estimates to NORTEL's VP of Carrier & Wireless,

and AT&T's VP of Custom Development.

Brand Manager, 1998 - 2000

  · AT&T wireline switch Customer Prime - Developed requirement Feature Specification Documents

for the AT&T Class 4/5 wireline long distance switch (covering AIN SCP, TR-533, SS7, ISDN/PRI,

and Billing), and coordinated OAM&P signaling interface agreements with Lucent's OSSes.

Sr. Member of Scientific Staff (MSS), 1993 - 1997

  · Sprint R&D wireline switch team leader, software owner, and developer for Sprint customized Class

4/5 wireline switch features involving ISDN, PRI, SS7, AIN and IN/1 TCAP.

EDUCATION / TRAINING

SDN, NFV, Video over LTE

Bachelor of Science, Computer Science

Tulane University, New Orleans, La

PROGRAMMING LANGUAGES / APPLICATIONS

C, PROTEL, Pascal

Microsoft Office (Word, Excel, PowerPoint, Visio, Project), UNIX, Linux (scripts)

Professional Affiliations

Past Board Member, Richardson/Plano TX Guide Right Foundation, Inc. 501(c)(3)

Past Polemarch (President), Kappa Alpha Psi Fraternity, Inc. (Richardson/Plano TX Alumni)

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