ISDN TEST FUNCTION 14 June, 2002
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4.7.2 BACK-TO-BACK TEST
To make a back-to-back test, you need:
• Two machines, one with the CiG4 board (G4 board used in the FX4, FR4,
ADAM, NAD, Stinger, and Russian) and the other with the SiG4 board (G4
board used with the Schmidt 3, S4, and Kaiser 1).
• Cross rosette
NOTE: You cannot make a back-to-back test using two SiG4 machines.
The procedure is as follows.
1. Switch off the machines
2. Connect two machines back-to-back using a cross rosette as follows.
3. Make the following bit switch adjustments:
• In the machine acting in NT mode (CiG4 board), set bits 0 and 1 of G4
parameter switch 0D to 1.
• In the machine acting in TE mode (SiG4 board) set bit 0 of G4 parameter
switch 0D to 0 and bit 1 to 1.
4. Reset the machines by switching them off, waiting a few seconds, then
switching back on.
5. Place a document in one of the machines, dial a number, then press Start.
6. After you have finished the test, set bits 0 and 1 of G4 parameter switch 0D
back to 0, then reset the machine.
NOTE: The following cannot be tested using this procedure:
• ISDN G3 communication
• Point to Multi (Like a broadcasting test, from one point to many places.)
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Cross Rosette
Machine A Machine B
H310T514.WMF
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