Telstra Commander i, Service Manual

Page: 27 / 195

Hardware Installation
Commander i+ Product Service Manual - Issue 2 Page 3-3
Configuration Diagram
In order to record the configuration used during installation it is
essential to fill in the configuration block diagram showing how the
keystations and AFUs are connected.
Simply draw a line indicating what each unit (keystation / AFU) is
connected to. On the drawn line write in the approximate cable length.
The termination resistor used should also be recorded.
This form is included in Appendix A and can be photocopied as
required. After completing the form it can be left on site with the
system administrator.
Master 1
Standard 3
Standard 5
Standard 7 Standard 8
Master 2 /
Standard 2
Standard 4
Standard 6
MDF
Commander
i
Configuration Diagram
Location:
AFU AFU
AFU 1
AFU 2
Master station number 1 located
within 60 metres of star centre
200 ohms on the end of every
branch longer than 10 metres
See Note 1
8
2 See Note 2
60
See Note 3
2
4
Master Station Number
1 Position
Termination
Max number of branches
Min number of branches
longer than 10 metres
Max branch length
Total sum of all branches
Max number of units per
branch
Max number of units
within 10 metres of star
- Maximum bus length: 200 metres.
- Terminations: 100 ohms at ends
of the bus only (2 terminations only).
- No more than four
keystations / AFUs within any 15
metre segment of cable.
- Master stations can be anywhere
on the bus.
Master station number 1 located
within 10 metres of star centre
200 ohms on the end of every
branch longer than 10 metres
See Note 1
9
2 See Note 2
150
Maximum 400 metres
2
4
Star Wiring Rules Extended Star
Bus Wiring Rules
Note 1: If two units are connected on a branch then only the end unit is terminated.
Note 2: There must be at least two branches longer than 10 metres
Note 3: If there are 8 branches at 60 metres the total length is 480 m (8 x 60 m = 480 metres)
Basic Star