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Motorola SECTEL 3500 Rear
Rear view of the Motorola SECTEL 3500 STU-III showing bracket to angle phone for desktop installation (or locks against the bottom to keep the phone flat using four rubber feet).
ZERO button clears all encryption keys (sanitizing it so that the key or keys are completely unrecoverable). The ZERO button turns it into a $20 desk phone... until it is rekeyed.
Power adapter plugs into connector on left side.
Another SECTEL 3500 with Video Display Unit in background.
Motorola SECTEL 3500 Rear
Rear view of the Motorola SECTEL 3500 STU-III showing bracket to angle phone for desktop installation (or locks against the bottom to keep the phone flat using four rubber feet).
ZERO button clears all encryption keys (sanitizing it so that the key or keys are completely unrecoverable). The ZERO button turns it into a $20 desk phone... until it is rekeyed.
Power adapter plugs into connector on left side.
Another SECTEL 3500 with Video Display Unit in background.