Factory Default Cisco ATA187

1.

connect an analog phone to line1

2.

hang-off the phone and press "setup" key

3.

enter the pin code (24726#)

4.

press 0 to set factory default

 reference:

http://www.cisco.com/en/US/docs/voice_ip_comm/cata/187/1_0/english/administration/guide/sip/a187_agBcd.html