The rubber accessibility probe is intended for testing accessibility on modular jacks per Section 20 of the Standard for Communications-Circuit Accessories, UL1863:2004. This probe meets the specifications as shown in Fig. 20.1. This probe is provided as a “set” of 5 identical probes as the probes can be damaged during use due to the soft rubber material being inserted into potentially sharp modular jacks. Damaged probes should be discarded – only undamaged probes should be used to insure reliable test results.