User guide

115
Chapter 5 - AT Commands
the type of line each customer has, and if that line is labeled as a data line (modem or fax), it
will not accept a speech call originated on that line. However, 3.1 kHz audio information
transfer capability is allowed on data lines (modem or fax) by most switches. S55 also lets
you define whether a progress indicator information element (which indicates that the
origination address of the POTS call is non-ISDN) is sent with the SETUP message for the
POTS port call. This may help POTS port calls get through certain CO switches.
S1 Speech, no progress indicator
S2 3.1 kHz Audio, no progress indicator
S17 Speech, origination address is non-ISDN
S18 3.1 kHz Audio, origination address is non-ISDN
S56 Calling Party Number IE Settings
(applies to NET3 [!C0=2] switch type only)
Unit: decimal ASCII code
Range: 128 Disable
Type of Number
0 Unknown,
16 International
32 National
48 Network specific
64 Subscriber
96 Abbreviated
Numbering Plan
0 Unknown
1 ISDN/telephony
3 Data
4 Telex
8 National standard
9 Private
Default: 128 (disabled)
Modifies the value of Octet 3 of the Calling Party Number Information Element that is sent
within the SETUP message for data and POTS port (voice/modem/fax) calls. To set a specific
number type and numbering plan, select an option from the Type of Number section above and
add its value to the value of an option in the Numbering Plan section above. For example, a
National/ISDN Calling Party Number IE would be S56=33, where 32 (National) + 1 (ISDN/
telephony) = 33 (National/ISDN). If there is no Data Directory Number (for data calls) nor
Voice Directory Number (for voice/modem/fax calls), no Calling Party Number IE is sent. By
default S56=128, which means no Calling Party Number IE is sent.
S57 Called Party Number IE Settings
(applies to NET3 [!C0=2] switch type only)
Unit: decimal ASCII code
Range: 128 Disable
Type of Number
0 Unknown,
16 International