Industrial networks and some cross campus links use longer cable lengths than the 100m specifications from TIA or ISO. IEEE 802.3cg specifies parameters for long-length single-pair cables. TestPro is the only cable certifier that has the capability to test cables as long as 1,000 m (1 km). For long cables, the RF performance at lower frequencies is very important. TestPro measures RF parameters down to 100 kHz or 0.1 MHz (as compared with 1 MHz for other cable certifiers). 4-pair cables may also be tested at lengths up to at least 1000m using Long Cable Test setting combined with custom test limits.