ATL Telecom AM200 - Manual (Page 28)

ATL User Guide
AM200 Modem 28
7 SELECTING THE CIRCUIT CONFIGURATION
The term 'digital section' refers to the data link between the user ports of the connected AM200s.
In a standalone section, the AM200s provide the complete transmission system.
In a tandem section, the AM200s are used to extend an existing circuit or network port. To achieve
synchronous data transfer, the CO AM200 must derive its timing from the circuit to which it is connected.
A Point-to-Point link requires two AM200s, one CO and one CPE.
The AM200 at one end of the digital section is selected to be a CO; the remote end is selected to be a CPE.
For a tandem section, the AM200 connected to the tandem section is configured as the CO.
Please refer to the diagrams on the following pages.
7.1 STANDALONE SECTION
Key for following diagrams:
B
Clock Source
Buffer
Customer
Terminal
Customer
Terminal
AM200A AM200A
G.703/X.21/V.35/RS530/100BaseT
copper pair
CO CPE
Timing Timing