1. Reed relay technology in stored program control exchange finally quieted the environment.2. Reed relays are smaller and cheaper, thus better suited to data storage.3. Reed relays required none of this.4. Reed relays can switch faster than larger relays and require very little power from the control circuit.5. There is therefore a 5? switching matrix of reed relays , which constituted the A-switch. 6. A relay, usually a reed relay , has its contacts coated with a small quantity of mercury. 7. At the other end, similar relays steered the incoming digits from the tone decoder to a reed relay memory. 8. The changeover of the relays was controlled by a series of reed relays whose reed inserts were wetted with mercury. 9. The switching in TXE2s was carried out by reed relays and a typical TXE2 contained about 100, 000 reeds. 10. Rather than the reed relay matrix of the 1ESS, it used the minibar, a version of the crossbar switch.
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