7.1 ISDN Extended Messages

These messages are generated as answers to extended ISDN call commands (commands starting with a ‘*’), or upon incoming call occurrence, when the ‘extended’ interface is selected (S112 is 1 or 3).

The following lexical elements are used:

call_id:   Call idendifier

service:   Service associated to the call. Encoding as detailed in S111.

uui:   User to user information. when present, included in quotes. Example: "hello".

addr:   ISDN address.

addr*sub:  ISDN address and subaddress. A star separates the address and      subaddress. Subaddress is optional. Examples: 123, 123*456

called_addr*sub:  ISDN address and subaddress of called equipment.

calling_addr*sub:  ISDN address and subaddress of calling equipment.

na:   Network access (ISDN line) identifier.

ch:   DTE channel identifier. Encodind as detailed in S110.

b_ch:   B-channel identifier (1 for B1)

cause:   Call clearing cause (as supplied by ISDN), in hexadecimal.

charge:   Charge accounted by the network

Trailing commas are omitted. If user to user information is not present, the corresponding field is empty (no quotes).

 

Message	Description
OK	Immediate acknowledgment, dial command in progress
OK:call_id   OK:call_id,na,ch	Immediate acknowledgment, dial command in progress (S112=1) Immediate acknowledgment, dial command in progress (S112=3)
COMPLETED:call_id	Command (ISDN facility) terminated successfully
REJECTED:call_id,cause	Command (ISDN facility) rejected
RING:call_id,service,uui,calling_addr*sub RING:call_id,service,uui,calling_adr*sub, na,b_ch,called_addr*sub	Incoming call present (S112=1)   Incoming call present (S112=3)
CALL PROCEEDING:call_id CALL PROCEEDING:call_id,na,ch,b_ch	Call is being established (corresponds to the Q931 Call Proceeding message. This message is only generated when dialing in overlap sending mode.
ALERT:call_id ALERT:call_id,na,ch,b_ch	The called party is ‘ringing’ (S112 bit 7 is 1)
PROGRESS:call_id,cause PROGRESS: call_id,cause,na,ch,b_ch	Call in progress. If cause is 0, the B-channel is allocated by ISDN. If cause is 1, ISDN signals are in interworking condition. This message is only generated when S112 bit 7 is 1
CONNECTED:call_id,uui CONNECTED:call_id,uui,na,ch,b_ch	Call established (S112=1). Call established (S112=3)
CLEARED:call_id,cause[,uui,charge]	Call cleared. See next section for call clearing causes
DISPLAY:0,1D,addr	Access deflection address
DISPLAY:0,1E,addr*sub	Terminal redirection address
DISPLAY:call_id,1F,charge	Current charge (tax information)

7.2 Extended Negotiation Messages

These messages are generated during protocol negotiation.]

 

Numeric Value	Text Form	Description
40	CARRIER 300	Line speed 300 bps
44	CARRIER 1200/75	Line speed 1200 bps (transmit) and 75 bps (receive)
45	CARRIER 75/1200	Line speed 75 bps (transmit) and 1200 bps (receive)
46	CARRIER 1200	Line speed 1200 bps
47	CARRIER 2400	Line speed 2400 bps
48	CARRIER 4800	Line speed 4800 bps
50	CARRIER 9600	Line speed 9600 bps
52	CARRIER 14400	Line speed 14400 bps
54	CARRIER 19200	Line speed 19200 bps
55	CARRIER 28800	Line speed 28800 bps
56	CARRIER 38400	Line speed 38400 bps
57	CARRIER 56000	Line speed 56000 bps
58	CARRIER 57600	Line speed 57600 bps
59	CARRIER 64000	Line speed 64000 bps
60	CARRIER 115200	Line speed 115200 bps
61	CARRIER 230400	Line speed 230400 bps
66	COMPRESSION: CLASS 5	MNP 5 data compression
67	COMPRESSION: V42BIS	V.42bis data compression
69	COMPRESSION: NONE	No data compression
70	PROTOCOL: NONE	No data communication protocol
77	PROTOCOL: LAP-M	V.42 error correction
80	PROTOCOL: ALT	MNP 4 error correction
83	PROTOCOL: V120	V.120 protocol
86	PROTOCOL: PAD	X.25/PAD protocol
87	PROTOCOL: V14	V.14 rate adaptation protocol