Viking Hot DialerVK-K-1900-5 provides 1 to 32 digit Touch Tone dialing on C.O. lines or analog PABX/KSU stations, and 1 and 4 second pauses as needed to use behind a PABX, access a pager from an alarm contact, etc. The K-1900-5 also blocks hand-held dialers and "hook-switch" or pulse dialing