[M.390] Recommendation M.390 (11/88) - Numbering in systems on symmetric pair cable
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| | Table of Contents | ITU-T Rec. M.390 - NUMBERING IN SYSTEMS ON SYMMETRIC PAIR CABLE
NOTES
NUMBERING IN SYSTEMS ON SYMMETRIC PAIR CABLE
1 Systems providing 12 telephone carrier circuits on a symmetric pair in cable (12 12) systems
2 Systems providing five groups or less
2.1 Numbering in systems comprising both erect and inverted groups
2.2 Numbering in systems with inverted groups
2.3 Systems with four groups
3 Systems providing two supergroups
3.1 Alternative frequency arrangements
3.2 Numbering of supergroups, groups and channels
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