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Hardware switch settings
SDTI2 switch settings (NTAK10)
SPRI2 switch settings (NTAK79)
553-3021-209
Standard 1.00
Appendix A – General information for the United Kingdom
Switch
S1-2
S2-1
S2-2
S3-1
S4-1
S4-2
Switch
S1-1
S1-2
S2-1
S2-2
S3-1
S3-2
S4-1
S4-2
July 1999
Down (On)
CC Enabled
120¾
75¾
Normal
firmware
Rx Earthed
Tx Earthed
Down (On)
DCH Enabled
DCH Disabled
DASS/DPNSS
120¾
75¾
Not used
CC Enabled
Rx Earthed
Tx Earthed
Up (Off)
CC Disabled
75¾
120¾
French
firmware
Rx Open
Tx Earthed
Up (Off)
Q.931
75¾
120¾
Not used
CC Disabled
Rx Open
Tx Open