ADTRAN ISU 128 user manual Line Clock, Switch, Protocol, Call Type, Dial Mode, Echo Tone

Appendix D. S-Register List

S51	LINE CLOCK	Selects the clock mode in leased mode.
		0	= Slave (default)
		1	= Master (Leased line only, limited distance
			MODEM application only).
S52	SWITCH	Selects the network switch type for dial service.
	PROTOCOL	0 = AT&T 5ESS
		1	= Northern Telecom DMS-100
		2	= National ISDN-1
		3	= NEC
S53	CALL TYPE	Call type (dial service only)
		0	= Speech
		1	= Audio
		2	= 56 kbps data
		3	= 64 kbps data
S54	PROTOCOL	Rate adaption protocol type.
	TYPE	1	= Clear Channel (no rate adaption)
		2	= BONDING mode 1
		3	= SAP (simple ADTRAN protocol)
		4	= T-link
		5	= V.110
		6	= V.120
		7	= V.34

9= DSU 57.6 kbps asynchronous 11= FALLBACK

12= PPP async-to-sync

S55	DIAL MODE	Selects dialing interface.
		0	= Front panel only (always available)
		1	= RS-366 dialing port
		2	= AT commands
		3	= V.25 bis dialing
S56	ECHO TONE	Enables an echo tone which suppresses the echo
		cancellers in a voice circuit. Can be used to trick the
		switch to allow sending data over a line optioned for
		voice ISDN service.
		0	= None
		1	= Answer
		2	= Originate
		3	= Both

112 ISU 128 User Manual 61202.029L2-1