ISDN Software Reference for Linux and Windows
308
Parameter Description Supported values
usrinfo_layer1_protocol Layer 1
protocol to
use on bearer
channel
ISDN_UIL1_CCITTV.110 - CCITT
standardized rate adaptation V.110)
ISDN_UIL1_G711uLAW -
recommendation G.711 u-Law
ISDN_UIL1_G711ALAW -
recommendation G.711 a-Law
ISDN_UIL1_G721ADCPM -
recommendation G.721 32 kbits/s
ADCPM and recommendation I.460
ISDN_UIL1_G722G725 -
recommendation G.772 and G.725 -
7kHz
ISDN_UIL1_H261 -
recommendation H.262 - 384 kbits/s
video
ISDN_UIL1_NONCCITT - Non-
CCITT standardized rate adaptation
ISDN_UIL1_CCITTV120 - CCITT
standardize rate adaptation V.120
ISDN_UIL1_CCITTX31 - CCITT
standardized rate adaptation
X.31HDLC
NOTE: This element must be set to
ISDN_NOTUSED if it is not to be
used in the setup message.