3Com PC Card manual S14, S16, S18, S19

34	CHAPTER 5: USING THE MODEM
		S14	Bit-mapped. Storable. Bit 1. Echo command characters (E CMD)
			■	0	= No echo
			■	1	= Echo
			Bits 2 and 4 generate result codes (Q CMD)
			■	0	= Enable result codes
			■	1	= No result codes
			■	2	= Result codes enabled only when originate mode in effect
			Bit 3. Verbose/numeric result codes (V CMD)
			■	0	= Numeric result codes
			■	1	= Verbose result codes
			Bit 5. Tone / Dial (P and T CMD)
			■	0	= Tone dialing (T CMD) toner
			■	1	= Pulse dialing (P CMD)
			Bit 7. Current operating mode.
			■	0	= Answer mode
			■	1	= Originate mode
		S16	Test Status (Bit-mapped). Nonstorable. Bit 0 is Analog loopback (&T1 CMD)
			■	0	= No Analog loopback
			■	1	= Analog loopback active
			Bit 2. Digital loopback (&T3 CMD)
			■	0	= No Local digital loopback
			■	1	= Local digital loopback active
			Bit 3. Status of Local digital loopback initiated by remote mode
			■	0	= No Local digital loopback
			■	1	= Local digital loopback initiated by remote modem active
			Bit 4. Remote digital loopback (&T6 CMD)
			0 = No Remote digital loopback active
			1 = Remote digital loopback initiated and granted by remote
			Bit 5. Remote digital loopback with self test (&T7 CMD)
			■	0	= No Remote digital loopback active
			■	1	= Remote digital loopback with self test initiated and granted by remote
			Bit 6. Analog loopback with self test (&T8 command)
			■	0	= No Analog loopback
			■	1	= Analog loopback with self test active
		S18	Test Timer. 0 = Infinite test time. Any other value specifies the duration of the test.
			Value: 0 - 255. Default = 0. Storable.
		S19	Bit-mapped. Nonstorable.
			Bit 0
			■	0	Mu-Law codec
			■	1	A-Law codec
			Bits 1-2 are Auto Rob bit signalling mode detection
			■	00 Enable.
			■	01 Disable (64K).
			■	10 Enable (56K).