Chapter 12: Order WireThe order wire is simply a loaded voice frequency pair that runs through the T1 cable and appears inside each line repeater housing. When one technician is troubleshooting at the remote housing and one technician is at the central office, it is very convenient to have a place to plug in a technician's telephone ("butt-in phone"). The order wire is typically terminated to an automatic ringdown line at the office repeater area of the central office. If the copper order wire is not implemented, then the technician at the remote housing must have a two-way radio or cellular telephone with plenty of battery and talk time.
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