
Paul Liu
Create and maintain a robust carrier class IP backbone, with minimal staff resource yet highly manageable, resilient &... | Chicago, Chicago, United States
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Paul Liu’s Emails pa****@si****.com
Paul Liu’s Phone Numbers 1866388****
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Paul Liu’s Location Chicago, Chicago, United States
Paul Liu’s Expertise Create and maintain a robust carrier class IP backbone, with minimal staff resource yet highly manageable, resilient & scalable. Provide intelligent monitoring framework overseeing Inteliquent's VoIP tandem switching network. Advance predictive detection on soft-fail issues such as ASR/NER SLA degradation and sudden call volume decrease/increase. Advocating utmost MTTD (Mean Time to Detect) of network faults of various abstraction levels, from circuit/interface hard fails to path continuity, to trunk group soft fails, ASR/NER anomaly, holdtime, call arrival rate, and moving average aspects. Overall capacity planning & engineering of 200+ Sonus SBC's; facilitate SIP/eBGP peering with several dozen major MNO's, MSO's, xLEC's and ASP's; oversee TDM to SIP migration to realize SLA improvement and OPEX savings. Specialties: - Performance Benchmarking, Van Jacobson or Scott Bradner wannabe, worte a ping+ hammer tool back in 1991. - Proactive network monitoring, surveillance & fault detection, inc soft fails & trend analysis - Protocol Analysis: wrote tcpdump/snoop like sniffer program called etherstat/etherpair back in 1991; wrote SipTracer tool in 2009, enable easy call trace by entering only dialed digits. - Root Cause Analysis: reconstruct sequence of events; focusing on fault detection & process improvement - BH (busy hour) traffic analysis on a per customer, per market/region, or per service (e.g. 8YY, local, LD...etc) granularity. Also trending at weekly and monthly level.
Paul Liu’s Current Industry Inteliquent
Paul
Liu’s Prior Industry
General Dynamics
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Texas Instruments
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Harris
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At And T Bell Labs
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Cisco Systems
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Inteliquent
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Work Experience

Inteliquent
Senior Director of IP Engineering
Wed Jul 01 2009 00:00:00 GMT+0000 (Coordinated Universal Time) — Present
Inteliquent
Senior Manager, IP Engineering Group
Sun Jul 01 2007 00:00:00 GMT+0000 (Coordinated Universal Time) — Present
Inteliquent
IP Architect
Mon May 01 2006 00:00:00 GMT+0000 (Coordinated Universal Time) — Present
Cisco Systems
Technical Leader, Devtest
Mon Jan 01 2001 00:00:00 GMT+0000 (Coordinated Universal Time) — Wed Mar 01 2006 00:00:00 GMT+0000 (Coordinated Universal Time)
Cisco Systems
SE, CE, CSE
Thu Feb 01 1996 00:00:00 GMT+0000 (Coordinated Universal Time) — Mon Jan 01 2001 00:00:00 GMT+0000 (Coordinated Universal Time)
At And T Bell Labs
MTS
Thu Oct 01 1987 00:00:00 GMT+0000 (Coordinated Universal Time) — Thu Feb 01 1996 00:00:00 GMT+0000 (Coordinated Universal Time)
Harris
Software Engineer
Tue Oct 01 1985 00:00:00 GMT+0000 (Coordinated Universal Time) — Tue Sep 01 1987 00:00:00 GMT+0000 (Coordinated Universal Time)
Texas Instruments
Software Engineer
Fri Jun 01 1984 00:00:00 GMT+0000 (Coordinated Universal Time) — Sun Sep 01 1985 00:00:00 GMT+0000 (Coordinated Universal Time)
General Dynamics
Software Engineer
Tue Mar 01 1983 00:00:00 GMT+0000 (Coordinated Universal Time) — Fri Jun 01 1984 00:00:00 GMT+0000 (Coordinated Universal Time)