4RF Aprisa XE Technical Paper - Page 14

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4RF Aprisa XE Technical Paper
4.7.

External E1 master clock

Figure 16 : External E1 master clock network diagram
The above network has external multiplexers which require the transport of Unframed E1. The Master
multiplexer at the "Local" site will provide the clocking for the entire network. The first radio clocks off the
Unframed E1 coming from the "Master Mux" with its clocking source set to External. The radio at the far
end of the link is set to "Link". The multiplexer at the "Remote" site has to be set to "External" or "Receive"
clocking (naming dependant on manufacturer)
As clocking information is carried in the Unframed E1 the radios could also be set to Internal at the Local
site and Link at the Remote site.
Aprisa XE Clocking Technical Paper
14 | 15
Issued by: 4RF Customer Services 15 January 2009