pabx*CLI> show channeltypes
Type        Description                    Devicestate  Indications  Transfer
----------  -----------                    -----------  -----------  --------
Skinny      Skinny Client Control Protocol no           yes          no
MGCP        Media Gateway Control Protocol no           yes          no
Feature     Feature Proxy Channel Driver   no           yes          no
Local       Local Proxy Channel Driver     no           yes          no
Console     OSS Console Channel Driver     no           yes          no
Agent       Call Agent Proxy Channel       yes          yes          no
SIP         Session Initiation Protocol (S yes          yes          yes
Phone       Standard Linux Telephony API D no           no           no
IAX2        Inter Asterisk eXchange Driver yes          yes          yes