User's Manual

COMPANY CONFIDENTIAL
41
1.13.4 LTE: VoLTE – VT Call
Supplementary Services
Support for VT call supplementary services:
1. Call Hold/Resume
2. Call waiting
a. Between two VT/VS calls
b. Be
tween VT/VS call and VOIP call
c. Between VT/VS call and 1x call
3. Call conference
4. Caller id Presentation/Restriction5. DTMF
1.13.5 LTE: VoLTE – Early
Media Support
Support for early media in VoLTE
1.13.6 LTE: VoLTE – VoLTE
Support in RIL, Android
Telephony and
QMI_VOICE
VoLTE support in RIL, Android Telephony and
QMI_VOICE
The Linux features described in this chapter are:
 Device Drivers
 Modem Interface
 Linux Kernel and BSP
 Other
 Power Management
 USB
 Validated Configuration
 Development/Debug
Table 5-1 Linux features
# Feature Feature description
2.1 Device Drivers
2.1.1 UART Driver Peripheral driver for Universal
Asynchronous Receiver/Transmitter
2.1.2 I2C Driver Peripheral driver for Inter-IC bus up to
100 kbps or 400 kbps for Fast mode
2.1.3 I2S Driver Peripheral driver for Inter-IC sound bus.
I2S is an industry standard (invented by
Philips) three-wire interface for
streaming stereo audio between
devices. Typical applications include
digital audio transfer between a
CPU/DSP and a DAC/ADC. The I2S
core allows a Wishbone master to
stream stereo audio to and from I2S
capable devices.
2.1.4 SD/MMC Interface Secure digital memory support.