diff --git a/channels/chan_alsa.c b/channels/chan_alsa.c
index 58382881e7..bfc75cc23e 100644
--- a/channels/chan_alsa.c
+++ b/channels/chan_alsa.c
@@ -57,13 +57,14 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/musiconhold.h"
 #include "asterisk/poll-compat.h"
 
-/*! Global jitterbuffer configuration - by default, jb is disabled */
+/*! Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in alsa.conf.sample */
 static struct ast_jb_conf default_jbconf = {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 
diff --git a/channels/chan_console.c b/channels/chan_console.c
index c08e3e5ab0..a5f22be2dc 100644
--- a/channels/chan_console.c
+++ b/channels/chan_console.c
@@ -172,13 +172,14 @@ AST_RWLOCK_DEFINE_STATIC(active_lock);
  * \brief Global jitterbuffer configuration 
  *
  * \note Disabled by default.
+ * \note Values shown here match the defaults shown in console.conf.sample
  */
 static struct ast_jb_conf default_jbconf = {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 
diff --git a/channels/chan_dahdi.c b/channels/chan_dahdi.c
index 80f0211d7c..3e0fc22310 100644
--- a/channels/chan_dahdi.c
+++ b/channels/chan_dahdi.c
@@ -280,14 +280,15 @@ static const char * const lbostr[] = {
 "-22.5db (CSU)"
 };
 
-/*! Global jitterbuffer configuration - by default, jb is disabled */
+/*! Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in chan_dahdi.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 
diff --git a/channels/chan_h323.c b/channels/chan_h323.c
index ccc034872c..07646652f5 100644
--- a/channels/chan_h323.c
+++ b/channels/chan_h323.c
@@ -114,14 +114,15 @@ onhold_cb on_hold;
 
 int h323debug; /*!< global debug flag */
 
-/*! \brief Global jitterbuffer configuration - by default, jb is disabled */
+/*! \brief Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in h323.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 
diff --git a/channels/chan_mgcp.c b/channels/chan_mgcp.c
index f71948bd44..293a2c1feb 100644
--- a/channels/chan_mgcp.c
+++ b/channels/chan_mgcp.c
@@ -93,14 +93,15 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #define INADDR_NONE (in_addr_t)(-1)
 #endif
 
-/*! Global jitterbuffer configuration - by default, jb is disabled */
+/*! Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in mgcp.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 
diff --git a/channels/chan_oss.c b/channels/chan_oss.c
index 10b0ed0fd5..67c55c592d 100644
--- a/channels/chan_oss.c
+++ b/channels/chan_oss.c
@@ -65,14 +65,15 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 
 #include "console_video.h"
 
-/*! Global jitterbuffer configuration - by default, jb is disabled */
+/*! Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in oss.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 84a5d7d126..2192facaab 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -563,14 +563,15 @@ static int unauth_sessions = 0;
 static int authlimit = DEFAULT_AUTHLIMIT;
 static int authtimeout = DEFAULT_AUTHTIMEOUT;
 
-/*! \brief Global jitterbuffer configuration - by default, jb is disabled */
+/*! \brief Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in sip.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;                /*!< Global jitterbuffer configuration */
 
@@ -17567,11 +17568,16 @@ static char *sip_show_settings(struct ast_cli_entry *e, int cmd, struct ast_cli_
 	ast_cli(a->fd, "  802.1p CoS RTP video:   %d\n", global_cos_video);
 	ast_cli(a->fd, "  802.1p CoS RTP text:    %d\n", global_cos_text);
 	ast_cli(a->fd, "  Jitterbuffer enabled:   %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_ENABLED)));
-	ast_cli(a->fd, "  Jitterbuffer forced:    %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_FORCED)));
-	ast_cli(a->fd, "  Jitterbuffer max size:  %ld\n", global_jbconf.max_size);
-	ast_cli(a->fd, "  Jitterbuffer resync:    %ld\n", global_jbconf.resync_threshold);
-	ast_cli(a->fd, "  Jitterbuffer impl:      %s\n", global_jbconf.impl);
-	ast_cli(a->fd, "  Jitterbuffer log:       %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_LOG)));
+	if (ast_test_flag(&global_jbconf, AST_JB_ENABLED)) {
+		ast_cli(a->fd, "  Jitterbuffer forced:    %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_FORCED)));
+		ast_cli(a->fd, "  Jitterbuffer max size:  %ld\n", global_jbconf.max_size);
+		ast_cli(a->fd, "  Jitterbuffer resync:    %ld\n", global_jbconf.resync_threshold);
+		ast_cli(a->fd, "  Jitterbuffer impl:      %s\n", global_jbconf.impl);
+		if (!strcasecmp(global_jbconf.impl, "adaptive")) {
+			ast_cli(a->fd, "  Jitterbuffer tgt extra: %ld\n", global_jbconf.target_extra);
+		}
+		ast_cli(a->fd, "  Jitterbuffer log:       %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_LOG)));
+	}
 
 	ast_cli(a->fd, "\nNetwork Settings:\n");
 	ast_cli(a->fd, "---------------------------\n");
diff --git a/channels/chan_skinny.c b/channels/chan_skinny.c
index 95b8788020..adaacd21b9 100644
--- a/channels/chan_skinny.c
+++ b/channels/chan_skinny.c
@@ -226,14 +226,15 @@ static char version_id[16] = "P002F202";
 #endif
 #endif
 
-/*! Global jitterbuffer configuration - by default, jb is disabled */
+/*! Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in skinny.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 
@@ -1377,15 +1378,6 @@ static struct skinny_device_options *default_device = &default_device_struct;
 	
 static AST_LIST_HEAD_STATIC(devices, skinny_device);
 
-/*static struct ast_jb_conf default_jbconf =
-{
-	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = ""
-};
-static struct ast_jb_conf global_jbconf;*/
-
 struct skinnysession {
 	pthread_t t;
 	ast_mutex_t lock;
@@ -3843,12 +3835,17 @@ static char *handle_skinny_show_settings(struct ast_cli_entry *e, int cmd, struc
 	ast_cli(a->fd, "  Date Format:            %s\n", date_format);
 	ast_cli(a->fd, "  Voice Mail Extension:   %s\n", S_OR(global_vmexten, "(not set)"));
 	ast_cli(a->fd, "  Reg. context:           %s\n", S_OR(regcontext, "(not set)"));
-	ast_cli(a->fd, "  Jitterbuffer enabled:   %s\n", (ast_test_flag(&global_jbconf, AST_JB_ENABLED) ? "Yes" : "No"));
-	ast_cli(a->fd, "  Jitterbuffer forced:    %s\n", (ast_test_flag(&global_jbconf, AST_JB_FORCED) ? "Yes" : "No"));
-	ast_cli(a->fd, "  Jitterbuffer max size:  %ld\n", global_jbconf.max_size);
-	ast_cli(a->fd, "  Jitterbuffer resync:    %ld\n", global_jbconf.resync_threshold);
-	ast_cli(a->fd, "  Jitterbuffer impl:      %s\n", global_jbconf.impl);
-	ast_cli(a->fd, "  Jitterbuffer log:       %s\n", (ast_test_flag(&global_jbconf, AST_JB_LOG) ? "Yes" : "No"));
+	ast_cli(a->fd, "  Jitterbuffer enabled:   %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_ENABLED)));
+	 if (ast_test_flag(&global_jbconf, AST_JB_ENABLED)) {
+		ast_cli(a->fd, "  Jitterbuffer forced:    %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_FORCED)));
+		ast_cli(a->fd, "  Jitterbuffer max size:  %ld\n", global_jbconf.max_size);
+		ast_cli(a->fd, "  Jitterbuffer resync:    %ld\n", global_jbconf.resync_threshold);
+		ast_cli(a->fd, "  Jitterbuffer impl:      %s\n", global_jbconf.impl);
+		if (!strcasecmp(global_jbconf.impl, "adaptive")) {
+			ast_cli(a->fd, "  Jitterbuffer tgt extra: %ld\n", global_jbconf.target_extra);
+		}
+		ast_cli(a->fd, "  Jitterbuffer log:       %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_LOG)));
+	}
 
 	return CLI_SUCCESS;
 }
diff --git a/channels/chan_unistim.c b/channels/chan_unistim.c
index 8b0f233131..f4b92330ea 100644
--- a/channels/chan_unistim.c
+++ b/channels/chan_unistim.c
@@ -187,14 +187,15 @@ static void dummy(char *unused, ...)
 	return;
 }
 
-/*! \brief Global jitterbuffer configuration - by default, jb is disabled */
+/*! \brief Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in unistim.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 				
diff --git a/channels/chan_usbradio.c b/channels/chan_usbradio.c
index 73995dd074..925629f850 100644
--- a/channels/chan_usbradio.c
+++ b/channels/chan_usbradio.c
@@ -187,14 +187,15 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #define	EEPROM_TXCTCSSADJ	15
 #define	EEPROM_RXSQUELCHADJ	16
 
-/*! Global jitterbuffer configuration - by default, jb is disabled */
+/*! Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in usbradio.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 static struct ast_jb_conf global_jbconf;
 
diff --git a/channels/misdn_config.c b/channels/misdn_config.c
index e14f2adee4..23c2c6d80e 100644
--- a/channels/misdn_config.c
+++ b/channels/misdn_config.c
@@ -47,14 +47,15 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #define NUM_GEN_ELEMENTS (sizeof(gen_spec) / sizeof(struct misdn_cfg_spec))
 #define NUM_PORT_ELEMENTS (sizeof(port_spec) / sizeof(struct misdn_cfg_spec))
 
-/*! Global jitterbuffer configuration - by default, jb is disabled */
+/*! Global jitterbuffer configuration - by default, jb is disabled
+ *  \note Values shown here match the defaults shown in misdn.conf.sample */
 static struct ast_jb_conf default_jbconf =
 {
 	.flags = 0,
-	.max_size = -1,
-	.resync_threshold = -1,
-	.impl = "",
-	.target_extra = -1,
+	.max_size = 200,
+	.resync_threshold = 1000,
+	.impl = "fixed",
+	.target_extra = 40,
 };
 
 static struct ast_jb_conf global_jbconf;