User's Manual

S16 – Modem Test Options
Factory setting: 0; Read only register
Bit 0 Local analogue test loop
0 OFF (factory setting)
1 ON (&T1)
Bit 1 Reserved
Bit 2 Local digital test loop
0 OFF (factory setting)
1 ON
Bit 3 Status of remote digital test loop
0 OFF (factory setting)
1 ON (&T6)
Bit 4 Status of a remote digital test loop, disengaged by the remote
modem
0 OFF (factory setting)
1 ON
Bit 5 Remote digital test loop with Self-Test
0 OFF (&T5) (factory setting)
1 ON (&T7)
Bit 6 Local analogue test loop with Self-Test
0 OFF (factory setting)
1 ON &T8)
Bit 7 Reserved
S18 – Test Timer
This determines the duration of a test loop, disengaged by &Tn. Where the
Register value is zero, test loops must be ended with &T0 or with the H-
command.
Range: 0-255 sec; factory setting: 0
S21 – V.24/General Options
Factory setting : 48 (30h) (00110000b); Read only register
Bit 0,1,2 Reserved
Bit 3,4 Condition of Control Line DTR
0 &D0
1 &D1
2 &D2 (factory setting)
3 &D3
Bit 5 Condition of Control Line DCD (M5)
0 (&C0)
S-REGISTERS 4-5