Telecom Professional Qualification case studies
Telecom Professional Qualification · Put your knowledge to work in context.
The Telecom Professional Qualification is a vendor-neutral credential for people who design, operate, regulate, or sell telecommunications services. Candidates typically come from network engineering, field operations, transmission and access planning, regulatory compliance, or technical account roles, and use the qualification to demonstrate breadth across the whole telecom stack rather than depth in a single vendor product. The Telecom Professional Qualification case studies are 5 cases and about 4,679 words.
15G Mid-Band Cell: Throughput Collapse Six Weeks After Launch
Northbridge Mobile launched 5G on n78 (3.5 GHz, 100 MHz, TDD pattern DDDSU) six weeks ago from a single rooftop site: 25 m height, three sectors, 64T64R active antenna units, mechanical downtilt 4 degrees, no electrical tilt applied, 3 Gbps backhaul. At launch the median busy-hour downlink throughput measured at 700-900 m from the site was 420 Mbps.
951 words, about 5 min2A Customer Sub-Prefix Takes the Mail and DNS Servers Off-Net
Meridian ISP (AS 64520) holds 203.0.113.0/22, published as a ROA with maxLength /22. It is dual-homed to Transit-A, which performs RPKI route origin validation, and Transit-B, which does not, and peers at one IXP.
889 words, about 4 min3Marginal GPON Power Budget Ahead of an XGS-PON Overlay
Helder Telecom serves 480 subscribers from one GPON OLT port through a 1:64 splitter over 19 km of G.652D feeder and 1.5 km of drop, using Class B+ optics (28 dB nominal budget at 1490 nm). At the ONT bulkhead, 12 of the 64 ONTs read -28.6 dBm downstream; all 12 sit on the longest feeder branches.
944 words, about 5 min438 Gbps DNS Amplification Against a Two-Node Anycast Footprint
Kestrel Cloud runs authoritative DNS for 900 customer zones from two anycast nodes, each with a 10 Gbps transit connection plus a 10 Gbps IXP port. At 14:05 a 38 Gbps DNS amplification attack hit both nodes, using ANY and DNSKEY queries with spoofed sources.
948 words, about 5 min5Legacy Unlimited Plan: Throttling, Repricing and a Self-Preference
Solent Mobile sells a legacy 'Truly Unlimited' postpaid plan at 35 per month to 12,000 subscribers, all on 24-month contracts with no price-variation clause. Three per cent of them exceed 1 TB per month and generate 31% of busy-hour downlink traffic on the two cell sites that are congested at 92% PRB.
947 words, about 5 min