User`s manual

Bit Value Description
Bit 7 0
Answer.
1 Originate. (default)
S15 Reserved
S16
Modem Test Options
Bit
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Value Description
0
1
0
0
1
0
1
0
1
0
1
0
1
0
Local analog Ioopback disabled. (default)
Local analog Ioopback enabled. (&T1)
Reserved.
Local digital Ioopback disabled. (default)
Local digital Ioopback enabled. (&T3)
Remote digital Ioopback off. (default)
Remote digital Ioopback in progress. (&T6)
RDL not active. (default)
RDL request from distant end is in service.
Remote digital Ioopback with self-test disabled.
(default)
Remote digital Ioopback with self-test enabled.
(&T7)
Analog Ioopback with self-test disabled. (default)
Analog Ioopback with self-test enabled. (&T8)
Reserved.
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S REGISTER REFERENCE - 3