sl7*CLI> show channeltypes
Type        Description                              Devicestate  Indications  Transfer
----------  -----------                              -----------  -----------  --------
H323        The NuFone Network's Open H.323 Channel  no           yes          no
Phone       Standard Linux Telephony API Driver      no           yes          no
IAX2        Inter Asterisk eXchange Driver (Ver 2)   yes          yes          yes
Agent       Call Agent Proxy Channel                 yes          yes          no
Console     OSS Console Channel Driver               no           yes          no
Skinny      Skinny Client Control Protocol (Skinny)  no           yes          no
MGCP        Media Gateway Control Protocol (MGCP)    yes          yes          no
Gtalk       Gtalk Channel Driver                     no           yes          no
Local       Local Proxy Channel Driver               yes          yes          no
SIP         Session Initiation Protocol (SIP)        yes          yes          yes
----------
10 channel drivers registered.