Pages that link to "On- and off-hook"
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The following pages link to On- and off-hook
External tools:
Displayed 2 items.
- On- and off-hook (transclusion) (links)
- On-hook (redirect to section "On-hook") (links)
- Telephone switchboard (links)
- On- and off-hook (links)
- Ringdown (links)
- Single-frequency signaling (links)