Dialogic DSI SS7MD - Manual (Page 130)

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7 Configuration Command Reference
set to 0, on detection of RPO, the signaling link is taken out of service and restoration commences.
This bit should normally be set to 1.
— Bit 20 used in conjunction with bit 9 to select point codes (see table above).
— Bit 21 should be set to 1 for use in Japanese networks; otherwise it should be set to 0.
All other bits are reserved for future use and should be set to 0.
Note: For correct ANSI operation, bits 8, 9, 10, 11 and 18 must be set to 1. This gives a typical
field value of 0x00040f00.