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- REMOBS
-
- The Silver Box, as stated earlier, is a lineman's handset or REMOBS
- (Remote Service Observing Systems). They allow Bell employees and phreakers
- to use the system to tap phones. By using a Silver Box and an ordinary Touch-
- Tone phone, one can dial directly into the RECEIVE ONLY portion of any
- customer's line (the mouthpiece is disconnected). Silver Boxes work as
- follows:
- Dial the number of a REMOBS unit. Bell apparently puts them in the 555
- information exchange (XXX-555-XXXX). A tone will then be heard for about two
- seconds and then silence. It is then necessary to key in, with a Touch-Tone,
- a 2-5 digit security code, holding down each digit down at least one second.
- If the code is not entered within 5-6 seconds, the REMOBS will disconnect, and
- must be dialed again. If the code is properly entered then another tone will
- be heard. Any 7-digit customer number can then be entered (the REMOBS can
- only handle certain exchanges which are prewired for it, and usually one
- machine can't monitor all of a multi-Central Office locality).
- The REMOBS will then connect up to the customer line. The phreaker will
- hear the low level idle tone. As the monitored party dials, the phreaker will
- hear the number being dialed and the entire conversation! At no time will the
- monitored party be aware that he has been tapped - there are no messages,
- clicks, strange sounds, etc.! When the phreaker is done listening to Customer
- A, he can key in a single "reset digit" (usually the last digit in the access
- code), which disconnects him from the monitored line and returns him to the
- tone so that he can dial Customer B. When the phreaker wants to quit, he keys
- in a single "disconnect digit," which disconnects him from the last line being
- monitored, and disconnects him from REMOBS so that REMOBS can be reset and be
- ready for another caller.
-