diff -Naur asterisk-88863.orig/channels/chan_unistim.c asterisk-88863.patched-unistimjb/channels/chan_unistim.c
--- asterisk-88863.orig/channels/chan_unistim.c	2007-11-06 10:15:38.000000000 +0600
+++ asterisk-88863.patched-unistimjb/channels/chan_unistim.c	2007-11-06 11:55:50.000000000 +0600
@@ -202,6 +202,17 @@
 	return;
 }
 
+/*! \brief Global jitterbuffer configuration - by default, jb is disabled */
+static struct ast_jb_conf default_jbconf =
+{
+        .flags = 0,
+	.max_size = -1,
+	.resync_threshold = -1,
+	.impl = ""
+};
+static struct ast_jb_conf global_jbconf;
+				
+
 /* #define DUMP_PACKET 1 */
 /* #define DEBUG_TIMER ast_verbose */
 
@@ -697,7 +708,7 @@
 	.type = type,
 	.description = tdesc,
 	.capabilities = CAPABILITY,
-	.properties = AST_CHAN_TP_WANTSJITTER,
+	.properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
 	.requester = unistim_request,
 	.call = unistim_call,
 	.hangup = unistim_hangup,
@@ -4509,6 +4520,9 @@
 		tmp->fds[0] = ast_rtp_fd(sub->rtp);
 		tmp->fds[1] = ast_rtcp_fd(sub->rtp);
 	}
+	if (sub->rtp)
+		ast_jb_configure(tmp, &global_jbconf);
+		
 /*      tmp->type = type; */
 	ast_setstate(tmp, state);
 	if (state == AST_STATE_RING)
@@ -5353,11 +5367,18 @@
 		ast_log(LOG_ERROR, "Unable to load config %s\n", config);
 		return -1;
 	}
+	
+	/* Copy the default jb config over global_jbconf */
+	memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
 
 	unistim_keepalive = 120;
 	unistim_port = 0;
 	v = ast_variable_browse(cfg, "general");
 	while (v) {
+		/* handle jb conf */
+		if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
+			continue;	
+	
 		if (!strcasecmp(v->name, "keepalive"))
 			unistim_keepalive = atoi(v->value);
 		else if (!strcasecmp(v->name, "port"))
diff -Naur asterisk-88863.orig/configs/unistim.conf.sample asterisk-88863.patched-unistimjb/configs/unistim.conf.sample
--- asterisk-88863.orig/configs/unistim.conf.sample	2007-11-06 10:15:43.000000000 +0600
+++ asterisk-88863.patched-unistimjb/configs/unistim.conf.sample	2007-11-06 10:57:47.000000000 +0600
@@ -8,6 +8,32 @@
 ;public_ip=                  ; if asterisk is behind a nat, specify your public IP
 ;autoprovisioning=no         ; Allow undeclared phones to register an extension. See README for important
                              ; informations. no (default), yes, tn.
+;------------------------------ JITTER BUFFER CONFIGURATION --------------------------
+; jbenable = yes              ; Enables the use of a jitterbuffer on the receiving side of a
+                              ; SIP channel. Defaults to "no". An enabled jitterbuffer will
+                              ; be used only if the sending side can create and the receiving
+                              ; side can not accept jitter. The SIP channel can accept jitter,
+                              ; thus a jitterbuffer on the receive SIP side will be used only
+                              ; if it is forced and enabled.
+
+; jbforce = no                ; Forces the use of a jitterbuffer on the receive side of a SIP
+                              ; channel. Defaults to "no".
+
+; jbmaxsize = 200             ; Max length of the jitterbuffer in milliseconds.
+
+; jbresyncthreshold = 1000    ; Jump in the frame timestamps over which the jitterbuffer is
+                              ; resynchronized. Useful to improve the quality of the voice, with
+                              ; big jumps in/broken timestamps, usually sent from exotic devices
+                              ; and programs. Defaults to 1000.
+
+; jbimpl = fixed              ; Jitterbuffer implementation, used on the receiving side of a SIP
+                              ; channel. Two implementations are currently available - "fixed"
+                              ; (with size always equals to jbmaxsize) and "adaptive" (with
+                              ; variable size, actually the new jb of IAX2). Defaults to fixed.
+
+; jblog = no                  ; Enables jitterbuffer frame logging. Defaults to "no".
+;-----------------------------------------------------------------------------------
+
 
 ;[black]                     ; name of the device
 ;device=000ae4012345         ; mac address of the phone