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-rw-r--r--funcs/func_channel.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/funcs/func_channel.c b/funcs/func_channel.c
index af3b8e515..84d115a73 100644
--- a/funcs/func_channel.c
+++ b/funcs/func_channel.c
@@ -183,6 +183,8 @@ static struct ast_custom_function channel_function = {
"R/W rxgain set rxgain level on channel drivers that support it\n"
"R/O state state for channel\n"
"R/W tonezone zone for indications played\n"
+ "R/W transfercapability ISDN transfer capability (one of SPEECH, DIGITAL,\n"
+ " RESTRICTED_DIGITAL, 3K1AUDIO, DIGITAL_W_TONES, or VIDEO).\n"
"R/W txgain set txgain level on channel drivers that support it\n"
"R/O videonativeformat format used natively for video\n"
#ifdef CHANNEL_TRACE