Panasonic Matsushita Cat 2 transformer AC/DC adapter/ power supply model KX-A07L for telephone equipment 

Input: 120 VAC   60 Hz   17 W   0.14 A

Output: 13 VDC 650 mA 

6' long cable 5.5 mm x 2.1 mm female plug connector  Tested; works as intended.  See my other AC/AC and AC/DC adapters from various brands.