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@startuml
skinparam BackgroundColor F0F0F0
participant "Bluetooth Headset" as HS
participant "Pure Phone" as AG
activate HS
activate AG
AG -> HS : Connection establishment
AG -> HS : Ring
...
-> HS : User initiated action
HS -> AG : AT+CKPD=200
AG -> HS : OK
AG -> HS : SCO link establishment
@enduml
PlantUML version 1.2020.02(Sun Mar 01 05:22:07 EST 2020)
(GPL source distribution)
Java Runtime: OpenJDK Runtime Environment
JVM: OpenJDK 64-Bit Server VM
Java Version: 11.0.12+7-post-Debian-2
Operating System: Linux
Default Encoding: UTF-8
Language: en
Country: US
--></g></svg>