1. Introduction  
2. Observations  
3. Results  
3.1. Source identification  
3.2. Background sources  
3.3. Variability  
3.4. Spectral indices  
3.5. Counterparts at other wavelengths  
4. Analysis  
4.1. Thermal free-free emission: radio jets or H ii regions?  
4.2. The radio–X-ray relation  
5. Discussion  
5.1. Levels of fragmentation in the G14.2 hubs  
5.2. Radio properties of the stellar population  
5.3. Evolution and development of G14.2  
5.4. Can the IRDC G14.2 form massive stars in the future?  
6. Summary and Conclusions