Verboice fails to [find Custom Channels for an incoming Asterisk call](https://github.com/instedd/verboice/blob/563c51d28c0966a98a9d48f997d4793739276b28/broker/src/asterisk/asterisk_call_manager.erl#L44-L47) because the Broker [only includes SIP channels](https://github.com/instedd/verboice/blob/563c51d28c0966a98a9d48f997d4793739276b28/broker/src/asterisk/asterisk_config.erl#L25) on [the dictionary of known channels](https://github.com/instedd/verboice/blob/563c51d28c0966a98a9d48f997d4793739276b28/broker/src/asterisk/asterisk_channel_srv.erl#L122-L125).