twelve frequency-shift telegraph channels with 120-cycle carrier telegraph spacing. ... The 4-kc band is divided into halves by Bell Type-EB split-channel equipment, which yields two narrow-band telephone channels. One of these ... These pilots are used for manual regulation and maintenance of the Clarenville- Oban link.
|Title||:||Bell Telephone System Technical Publications: Monograph B|
|Author||:||Bell Telephone Laboratories, Inc. Technical Library. Publication Dept|