The requestor might be another library or individual. As an alternative, with the more extensive deployment of the Internet remote printing software, tcp.int and with the MIME compliant extensions operational, email messages and their graphical attachments can be transmitted to a fax machine via the internet and delivered via a local phone call. The receipt phase involves the requester receiving the mailed images and deciding what to do with them. The email program typically would automatically decode and save the attached image files to disk. This method could be used now by anyone having appropriate hardware and software.
Most institutions are likely to have all components in use in one form or another.
A list of likely component follow. Typically this would be the hardware normally in use for day to day purposes. Needs to be able to support reasonably high resolution for graphics. This would be the network printer normally used for any application. Email software - Mime compliant software appropriate to the platform chosen.