Greenlee TM-500 Butt Set， POS[Product Information]- Enter your model numberto make sure this fits.
- Luminescent (glow-in-the-dark) KEYPAD
- Can be used safely on a DSL enabled line
- High Impedance monitor for monitoring line without disrupting existing traffic
- Over voltage and over current protection
- Tone and pulse dialing for versatility on old and new phone lines
