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480 Voice API for Windows Operating Systems Library Reference — November 2003
CT_DEVINFO — channel/time slot device information
• CT_IPT – IP connectivity
• CT_NTANALOG – analog interface. Analog and voice devices on board are handling call
processing
• CT_NTT1 – T-1 digital network interface
• CT_NTE1 – E-1 digital network interface
• CT_NTMSI – MSI/SC station interface
• CT_NTHIZ – high impedance (HiZ) interface. This value is bitwise-ORed with the type
of network interface. A digital HiZ T-1 board would return CT_NTHIZ | CT_NTT1. A
digital HiZ E-1 board would return CT_NTHIZ | CT_NTE1. An analog HiZ board would
return CT_NTHIZ | CT_NTTXZSWITCHABLE | CT_NTANALOG.
• CT_NTTXZSWITCHABLE – The network interface can be switched to the transmit
impedance state. This value is bitwise-ORed with the type of network interface. An
analog HiZ board would return CT_NTHIZ | CT_NTTXZSWITCHABLE |
CT_NTANALOG. This is used to transmit the record notification beep tone.
ct_busmode
Specifies the bus architecture used to communicate with other devices in the system [length: 1
(unsigned char)]. Possible values are:
• CT_BMSCBUS – TDM bus architecture
• CT_H100 – H.100 bus
• CT_H110 – H.110 bus
ct_busencoding
Describes the PCM encoding used on the bus [length: 1 (unsigned char)]. Possible values are:
• CT_BEULAW – mu-law encoding
• CT_BEALAW – A-law encoding
• CT_BELLAW – linear encoding
• CT_BEBYPASS – encoding is being bypassed
ct_rfu
Returned by ms_getctinfo( ) for DM3 MSI devices. This field returns a character string
containing the board and channel of the voice channel resource associated with the station
interface. This data is returned in BxxCy format, where xx is the voice board and y is the voice
channel. For example, dxxxB1C1 would be returned as B1C1. To subsequently use this
information in a dx_open( ) function, you must add the dxxx prefix to the returned character
string.
ct_ext_devinfo.ct_net_devinfo.ct_prottype
Contains information about the protocol used on the specified digital network interface device.
Possible values are:
• CT_CAS – channel associated signaling
• CT_CLEAR – clear channel signaling
• CT_ISDN – ISDN
• CT_R2MF – R2MF
On Intel® NetStructure® IPT Series boards, the ct_devfamily field is described as follows:
ct_devfamily
Specifies the device family [length: 1 (unsigned char)]. Possible values are:
• CT_NETSTRUCTIP – IPT series board