ATL Telecom AM2048 - Manual (Page 7)

10 ATL TELECOM USER GUIDE
AM2048A
2.1 EXAMPLE APPLICATIONS
The diagrams below illustrate some basic applications:
2.1.1 Desktop modem to desktop modem, no external timing
The circuit timing originates from the internal clock in the master, and is sent out to the
customer terminal at both ends.
2.1.2 Desktop modem to desktop modem, with external timing
For synchronous interfaces, the timing can be taken from the network and passed to the
customer’s terminating unit.
Network
Customer
Terminal
AM2048A AM2048A
G.703/X.21/V.35
1 or 2 copper pairs
Timing
G.703/X.21/V.35/10BaseT/USB
Master Slave
Customer
Terminal
Customer
Terminal
AM2048A AM2048A
G.703/X.21/V.35/10BaseT/USB
1 or 2 copper pairs
Master Slave
ATL TELECOM USER GUIDE
AM2048A
11
2.1.3 Desktop modem to desktop modem with split site working
This is referred to as point-to-multipoint working. The G.703 interface at the master end must
use the G.704 frame structure. It may be used for providing two Nx64k circuits from one
2Mbps pipe.
Note: When operating in Point to Multipoint, the master unit always has a G.703 user
interface.
The slave units may be EITHER all G.703 OR all Datacom (any mixture of X.21, V.35 and ePIM).
Customer
Terminal
Customer
Terminal
AM2048A
AM2048A
Master
Slave
Customer
Terminal
AM2048A
Slave
G.703/X.21/V.35/10BaseT/USB
G.703
2