Handbook

Table Of Contents
ClearFill Star CDMA
1100187 Rev. 1.0
Page 49 of 152
3.7 System Architecture
3.7.1 Rules from the Ethernet World
3.7.1.1 CAT5 lengths
Maximum CAT5 (or higher) cable length is 100 m (300 ft).
3.7.1.2 Optical lengths
Maximum length of the multi mode fibers is 550 m (1650 ft)
3.7.1.3 Cascade
Rules:
Up to 4 Levels, including the main switch connected to the BSI.
It is mandatory that all RRHs have same number of switches on the signal path to the
BSI. This is applicable for each VLAN.
Per switch a RRH is automatically assigned for the summing of up to 8 RRHs.
The maximum number of RRH (summing or not), connected to one GES is limited to
8. For higher numbers, PoE limitations may apply.
The total number of RRH per BSI is limited to 16.
3.7.2 Gigabit Ethernet Switch
3.7.2.1 Layer
Layer 2 in the physical layer model
3.7.2.2 Cascade
Rules:
Up to 4 Levels, including the main switch connected to the BSI.
It is mandatory that all RRHs have same number of switches on the signal path to the
BSI. This is applicable for each VLAN.
Per switch a RRH is assigned for the summing of up to 8 RRHs. In case more than 8
are connected to an individual switch there will be 2 RRHs dedicated for the
summing.
This should be avoided for the time being. Typical use case is 2 VLANs on the switch
(not more than 8 RRHs per VLAN per Switch).
The maximum number of RRH (summing or not), connected to one BSI is limited to 8.