Reference Guide for the Model XM128 ISDN Digital Modem
C-4
AT Command Set Reference
CPn
Loopback 4 control
CP0
Disable Loopback 4
CP1
Enable Loopback 4
CRn
n=0-3
0 *
Resumes a previously suspended call; n is the call identifier (Europe).
CSn
n=0-3
0 *
Suspends a call; n is the call identifier (Europe).
Ds
Dial s numbers and options that follow. See also S-register 38.0 and 35.4. For
a description of Extended S-registers, refer to Table D-4 on page D-5 in
Appendix D, “Status Registers and Result Codes."
The s options are listed as follows:
,
Pause for a time specified in S6. Remaining digits are dialed as in-band
DTMF.
+
Prefix for the second number string, to be used in making bundling or MPPP
calls.
W
Wait for second dial tone. Remaining digits are dialed as in-band DTMF (ISDN
numbering options).
Y0
Unknown type of number
Y1
International number
Y2
National number
Y3
Network-specific number
Y4
Subscriber number
Y6
Abbreviated number
Z0
Type of subaddress, NSAP with AFI=$50, IA5 characters
Z2
Type of subaddress, user specified, IA5 characters
N0
Unknown numbering plan
N1
ISDN/Telephony numbering plan (CCITT E.164/E.163)
N3
Data numbering plan (CCITT X.121)
N8
National standard numbering plan
N9
Private numbering plan
/
Called party subaddress delimiters
Format of “s” [[Yn][Nn]called_party_number][[W][,]]inband_dtmf_number
or
[[Yn][Nn]called_party_Number][/[Zn]called_party_subaddress/]
Table C-1.
Basic AT command set (continued)
Command
Options
Function and description
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