User Manual

Dimensioning rulesNortel Networks Confidential 5–9
S8000/S8002/S8006 BTS Reference Manual
5.2.3 Dimensioning of DSC board (with BCF)
5.2.3.1 Design of DSC boards
The following table gives the number of DSC boards required according to the
number of cells and the number of concentrated signaling links (without
redundancy).
Cell 1 LAPD 2 LAPD 3 LAPD
1 1 DSC – –
2 1 DSC 2 DSC –
3 1 DSC 2 DSC 3 DSC
4 1 DSC 2 DSC 3 DSC
5 1 DSC 2 DSC 3 DSC
6 1 DSC 2 DSC 3 DSC
Table 5–2 Board dimensioning
If at a given time, the number of DSCs available is less than the number given in
this table, the entire site is lost until the number of DSCs is again correct. It is
therefore strongly recommended to have a redundant DSC board.
The number of TEI that can be handled by one LAPD link is limited to 8.
Two cells cannot share the same LAPD unless the whole site is carried by the
primary LAPD, except in case of an hexadecimal site.
TEI of the same cell must have the same LAPD number (if a cell has less than eight
TEIs), two TEIs of different cells can also have the same concentrated channel.
There must be one DSC board per LAPD time slot: 1 DSC board can handle only
one LAPD and vice versa one LAPD must be associated with a single board.
5.3 Configurations
Table 5–3 presents the possible configurations for the S8000 Indoor and
S8000 Outdoor for each coupling system. The configurations indicated in the
table below are highest configurations. They are not always available within the
three frequency bands. This table is given for refrence only.
Note that the number of converters in a cabinet can be depopulated according the
number of DRXs (or e–DRXs) in the cabinet.