Appendix B

S-Register List

S0 . . . . . AUTO ANSWER . . . . . . Determines how the ISU 512 answers an incoming call. 0=Disable (ISU 512 does not answer call)

1=Enable (ISU 512 answers all calls) (default)

2=Dump all calls

S7 . . . . . CONNECT TIME. . . . . . Determines how long the ISU 512 waits for an outgoing call to be answered.

15=15 seconds

30=30 seconds (default)

60=1 minute 120=2 minutes 240=4 minutes

S26 . . . . 2047 Test Time . . . . . . . . Determines the amount of test time to allocate for a remote 2047 test. This number is approximately in 1 minute incre- ments.

0 to 255 (2 min is default)

S32 . . . . DTE DSR . . . . . . . . . . . . Controls the operation of the Data Set Ready signal on the DTE connectors.

0=Force DSR on always

1=DSR active only during a call

2=DSR active only when network interface is on

S33 . . . . DTE CD . . . . . . . . . . . . . Controls the operation of the Carrier Detect line on the DTE connectors.

0=Force CD on always

1=CD is active during a call

2=LOCD

3=Off Link Down

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ISU 512 User Manual

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ADTRAN user manual Appendix B Register List, =Enable ISU 512 answers all calls default