What should be used to isolate a payphone?
It depends if the phone uses battery reversal or not, and if it uses tones or ground signaling. If it is an older phone using ground signaling, the only way to isolate it is by using a setup made of two 7501-16 cards called the coin telephone setup. For further information on this setup, a Positron technician should be contacted. If it is a phone using tones and no battery reversal, the 751317, 751321 or 7501-16 cards may be used. The 751321 cards are the least expensive.
Related Questions
- Why is the subtype B consensus sequence used rather than a particular isolate, the consensus sequence for one of the more common subtypes (e.g. subtype C), or the consensus sequence for group M?
- Why is the subtype B consensus sequence used rather than a particular isolate, the consensus sequence for a different subtype, or the consensus sequence for Group M sequences?
- What should be used to isolate a payphone?
