Paul Liu Email & Phone Number

Greater Chicago Area

Managing a group of network engineers, to oversee carrier-grade IP backbone, serving 220 Sonus softswitches providing tandem services to tier-1 telco providers such as Verizon, AT&T, T-Mobile, Sprint, Comcast, Charter, Cox, Cablevision, Skype, Vonage, Google Voice, MagicJack..etc. The high-availability & highly redundant IP backbone consists 80+ Cisco ASR9000 routers, span across 32 major cities within USA,with over 100 10G WAN circuits froma dozen major carriers with diverse KMZ paths and entrance facilities.Feature functionality wise, the IP backbone is a multi-service MPLS core, with TE tunnels & QoS policies implemented; extensive eBGP public & private peering; full-mesh iBGP peering via route reflectors.The proactive network monitoring aspect includes SLA assurance, ASR/NER anamoly detection, trunkgroup soft-fail and call volume threshold alerting, as well as capacity planning for the VoIP data circuits from 1G, Nx1G, 10G.to Nx10G. Developed custom portals to monitor Cisco elements, WAN backbone anomalies, SIP peering, and SBC resources & traffic trending.

Greater Chicago Area

Manager of IP Engineering Group with several CCNP/CCIP/CCVP level direct reports. Babysit a class-4 tandem switching network consists of 34 central offices, 170+ Sonus GSX softswitches, 60+ Cisco 6509/7606 routers, interconnected via dozens of long-haul 1Gig/10Gig circuits.

Greater Chicago Area

Providing high availability service provider backbone connecting several dozen tandem offices together via OC3c and long-haul GigE circuits.Developing network management tool chest, providing proactive monitoring and call volume anomaly detection.Created SIPtracer app running on Linux platform, able to pick out the needle from the haystack, with dialed digits as sole input data, capture SIP call flow and subsequent RTP bear flow, with simple web GUI to launch wireshark for analysis.

Uncovering Cisco IOS bugs on 7300 & ESR10K platforms, before reaching the customers. Extensive working knowledge with ISSU HA and various POS/Ethernet linecards.

'96, Systems Engineer supporting various Ameritech business units'98,Corporate Consulting Engineer presenting voice/video/data triple play solutions to Mainland China MSO's; Advocating broadband IP metro-area network in lieu of traditional xWDM/Sonet/ATM/IP hierarchies.'99, Solutions Consulting Engineer for Cisco Customer Advocacy, conducting case studies embracing knowledge capture/transfer of DSL aggregation and home gateway hand-offs.

Project Leader of FUNET, Future Networking, predicting computing environment changes within AT&T Bell Labs, from 1990 to 1995. At that time, AT&T Bell Labs computing environment changed from mainframes with dumb terminals, to X terminals to the eventual desktop PCs and Sun workstations.Networking-wise, it went from datakit/radian to ISDN BRI to Starlan-10 to the eventual Ethernet standard. Data centers went from two dozen Fujitsu/Amdahl mainframes running UTS (mainframe UNIX) to hundreds of SUNOS/Solaris servers.Deployment of high speed LAN's @ Bell Labs Naperville campus supporting ~10,000 R&D staff:- FDDI campus backbone @ 1991-1992, using Cisco AGS+'s.- CDDI server backend network @ 1993, Crescendo Communications.- Switched Ethernet (Kalpana, Grand Junctions, Alantec), 1994-1995- ATM/Broadband-ISDN evals,1993-1995Published half dozen papers on AT&T Linus wrt network performance benchmarking, and a paper on 5ESS Code Optimization case study.

Developed LU6.2 print-spool applications on Intel 186 XENIX platforms. Addison, TX.

Project leader for TILANS (Totally Integrated LAN System), deployed VT100 terminal emulators onto PC's with Kermit file transfer and print spooling capabilities, on top of Ungermann-Bass Z80-based terminal server network, XNS / thick coax Ethernet / 2400 baud bridges. TI Equipment Group, Plano, TX.

Developed graphics database exchange applications across NSC HyperChannel backend network, on ComputerVision and Apollo CAD/CAM workstations, VAX 780's, CDC & IBM VM. F16 Division in Fort Worth, TX.

Ms, Computer Science

Bs, Computer Science

Education record

High School