synchronization priorities, this external clock should have the highest priority. If the external clock
generator is absent, it should not be included in the priority list.
E1-1, E1-2, E1-3 and E1-4 mean synchronization from one of the input E1 stream. If the E1
stream, which serves as a clock, is lost, the device switches to another clock according to the
priority level.
INTERNAL means synchronization from an internal clock source. This clock source should be the
last one in the priority list (but in the absence of any other clock source, for example, when only
Ethernet data are transmitted, this source can be the primary and the only one).
Switching between clock sources occurs within 100 ms, after loosing synchronization.
3.2.2.3 Nx64, RS-232/RS-485 and G.703/E0 Interfaces
The Orion3 product family can be equipped with a wide range of modular and exchangeable
daughtercards with different interfaces. In this manual we describe the most important four cards.
The first card supports Nx64 interfaces (V.35, V.36, X.21, V.28), the second card supports
asynchronous RS-232 interfaces, the third supports asynchronous RS-485 and the fourth
supports a codirectional G.703/E0 (64 kbps) interface.
Nx64 interfaces:
• V.35, Speed 64…8192 kbps
• V.36 (with termination), Speed 64…8192 kbps
• X.21 (with termination), Speed 64…8192 kbps
• V.28 (synchronous), Speed 64…192 kbps
Interface type is cable selected. You can use the command EXTRATE [N] (N=1…128) to set the
data rate (N*64 kbps).
RS-232 interface:
• RS-232, Speed 75, 1200-230400 bps
• number of data bits: 5…8
• number of stop bits:1, 1.5 or 2
• parity: odd/even/odd/mark/space
You can use the command EXTRATE [N] to set the baud rate (N is baudrate, for instance 9600).
The command RSFORMAT [format] is used to set the data format (example of format: 8N1).
RS-485 interface:
• RS485, Speed 75, 1200-230400 bps
• number of data bits: 5…8
• number of stop bits:1, 1.5 or 2
• parity: odd/even/odd/mark/space
You can use the command EXTRATE [N] to set the baud rate (N is baudrate, for instance 9600).
The command RSFORMAT [format] is used to set the data format (example of format: 8N1). The
RS485 interface supports half- and full-duplex operation configurable by the command
RSDUPLEX [F/H].
G.703/E0 codirectional 64 kbps interface:
• G.703/E0, Speed 64 kbps
• Range 500 m
There are different possibilities to synchronize the G.703/E0 64 kbps codirectional interface.
Usually this interface takes the clock from the G.703/E0 input signal and transmits it through the
SHDSL link to the G.703/E0 output signal. For that reason you can use the command SETCLOCK
to select the G.703/E0 clock as SHDSL clock source. But we also support external clocking,
internal clocking and clocking priorities. With the command G703CLOCK you select the reference
clock for the outgoing data.
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