Epson ESC/VP21 User Manual page 51

Bit
Value
Bit 7 0
1
S15
Reserved
S16 Modem Test Options
Bit Value Description
Bit 0 0
1
Bit 1 0
Bit 2 0
1
Bit 3 0
1
Bit 4 0
1
Bit 5 0
1
Bit 6 0
1
Bit 7 0
44
Description
Answer.
Originate. (default)
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.
S REGISTER REFERENCE - 3