17
Standalone G-Converter
TECHNICAL: 0118 931 2233
Notes:
1
Only allow unframed operation if a DCE speed of 2048Kbps will not “harm” the DTE.
2
Use this mode if no in-band management is required and the link is required to run a
permanent 2048Kbps. Also, use this mode if interfacing to another manufacturers
G.703/X.21 interface converter.
3
When an external clock is used it must be 20/- 50ppm as per TBR12/PD7024 for
non Autobauding operation or Nx/- 50ppm for auto baud operation.
4
Use this option if it is required to suppress TX data in the event of loss of RX data from the
G.70x link.
Default Unit Set-Up
When delivered, the G-Converter is set to operate as follows:
Interface selected
:
X.21 (LK9 to X.21 position)
Local/Remote
:
Local (SW4, 1 = off)
G.703/G.704 Interface
:
G.703 (SW4, 2 = off)
Allow Unframed
:
Yes (SW4, 3 = on)
I Lead Control
:
Follow Carrier (SW4,4=SW4,5 = on)
Permanent Straight Through
:
Not selected (SW4, 6 = on)
G.70x TX
:
Always enabled (SW4, 7 = off)
External Clock
:
Not selected (SW4,8 = off)
Remote loopback
:
Enabled(SW5,1 = off)
Autobauding
:
Not selected (SW5,4 = off)
Interface Impedance
:
75 Ohms (Un-balanced) see table
above in G.703 interface
presentation
section.
Front Panel loop switch enabled
:
Enabled (LK12 position 1 and 2)
Front panel loop switch
:
Off (centralised)
