Specifications

Appendix C - Cabling Considerations RJ21X Connector (Mediatrix 4124)
204
Mediatrix 4100
Figure 35: Front View of the RJ21X Receptacle – Pinout
17 pin17 pin42
18 pin18 pin43
19 pin19 pin44
20 pin20 pin45
21 pin21 pin46
22 pin22 pin47
23 pin23 pin48
24 pin24 pin49
Table 133: RJ21X Pinout (Continued)
Line Ring Tip
Note: Pins 25 and 50 are unused.