Decades into the era of email and smart phones, San Diego County is discontinuing the use of antiquated desk phones and fax machines. Estimated savings from throwing out desk phones and fax machines ranges from $1.5 million to $7 million, according to supervisors. Supervisors voted unanimously to discontinue fax machines and desk phones on Wednesday. The county has about 15,000 desk phones and 500 fax machines in use over its various buildings and facilities, according to supervisors. But the legislation passed by the supervisors on Wednesday leaves the door open for county departments and agencies to opt out of the policy and keep their desk phones.