Alcatel 1850 TSS-320 Technical Handbook page 59

The functions carried out by the unit can be splitted into the following sub-systems:
[1] Signal architecture sub-system (see paragraph 3.2 on page 58)
[2] Switching capacity sub-system (see paragraph 3.3 on page 70)
[3] Signal management sub-system (see paragraph 3.4 on page 71)
[4] Controller sub-system (see paragraph 3.5 on page 99)
[5] Protection sub-system (see paragraph 3.6 on page 112)
[6] Synchronization sub-system (see paragraph 3.7 on page 133)
[7] Auxiliary sub-system (see paragraph 3.8 on page 140)
[8] Power supply sub-system (see paragraph 3.9 on page 142)
On the following paragraphs a detailed description of each sub-system is given.
Technical Handbook Common
Functional Description
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01 57/270