diff --git a/coordinator/startup.lua b/coordinator/startup.lua
index c0addf1..a95b30c 100644
--- a/coordinator/startup.lua
+++ b/coordinator/startup.lua
@@ -4,23 +4,23 @@
 
 require("/initenv").init_env()
 
-local crash        = require("scada-common.crash")
-local log          = require("scada-common.log")
-local ppm          = require("scada-common.ppm")
-local tcallbackdsp = require("scada-common.tcallbackdsp")
-local util         = require("scada-common.util")
+local crash       = require("scada-common.crash")
+local log         = require("scada-common.log")
+local ppm         = require("scada-common.ppm")
+local tcd         = require("scada-common.tcd")
+local util        = require("scada-common.util")
 
-local core         = require("graphics.core")
+local core        = require("graphics.core")
 
-local config       = require("coordinator.config")
-local coordinator  = require("coordinator.coordinator")
-local iocontrol    = require("coordinator.iocontrol")
-local renderer     = require("coordinator.renderer")
-local sounder      = require("coordinator.sounder")
+local config      = require("coordinator.config")
+local coordinator = require("coordinator.coordinator")
+local iocontrol   = require("coordinator.iocontrol")
+local renderer    = require("coordinator.renderer")
+local sounder     = require("coordinator.sounder")
 
-local apisessions  = require("coordinator.session.apisessions")
+local apisessions = require("coordinator.session.apisessions")
 
-local COORDINATOR_VERSION = "v0.15.6"
+local COORDINATOR_VERSION = "v0.15.7"
 
 local println = util.println
 local println_ts = util.println_ts
@@ -334,7 +334,7 @@ local function main()
                 apisessions.check_all_watchdogs(param1)
 
                 -- notify timer callback dispatcher
-                tcallbackdsp.handle(param1)
+                tcd.handle(param1)
             end
         elseif event == "modem_message" then
             -- got a packet
diff --git a/coordinator/ui/components/processctl.lua b/coordinator/ui/components/processctl.lua
index 7e0016a..eaeb8ab 100644
--- a/coordinator/ui/components/processctl.lua
+++ b/coordinator/ui/components/processctl.lua
@@ -1,4 +1,4 @@
-local tcd               = require("scada-common.tcallbackdsp")
+local tcd               = require("scada-common.tcd")
 local util              = require("scada-common.util")
 
 local iocontrol         = require("coordinator.iocontrol")
diff --git a/graphics/elements/animations/waiting.lua b/graphics/elements/animations/waiting.lua
index 9dc089f..286c82e 100644
--- a/graphics/elements/animations/waiting.lua
+++ b/graphics/elements/animations/waiting.lua
@@ -1,6 +1,6 @@
 -- Loading/Waiting Animation Graphics Element
 
-local tcd     = require("scada-common.tcallbackdsp")
+local tcd     = require("scada-common.tcd")
 
 local element = require("graphics.element")
 
diff --git a/graphics/elements/controls/hazard_button.lua b/graphics/elements/controls/hazard_button.lua
index 6ffe74d..4745f4f 100644
--- a/graphics/elements/controls/hazard_button.lua
+++ b/graphics/elements/controls/hazard_button.lua
@@ -1,6 +1,6 @@
 -- Hazard-bordered Button Graphics Element
 
-local tcd     = require("scada-common.tcallbackdsp")
+local tcd     = require("scada-common.tcd")
 local util    = require("scada-common.util")
 
 local core    = require("graphics.core")
diff --git a/graphics/elements/controls/push_button.lua b/graphics/elements/controls/push_button.lua
index 564ad3c..e6f4920 100644
--- a/graphics/elements/controls/push_button.lua
+++ b/graphics/elements/controls/push_button.lua
@@ -1,6 +1,6 @@
 -- Button Graphics Element
 
-local tcd     = require("scada-common.tcallbackdsp")
+local tcd     = require("scada-common.tcd")
 
 local core    = require("graphics.core")
 local element = require("graphics.element")
diff --git a/graphics/elements/controls/sidebar.lua b/graphics/elements/controls/sidebar.lua
index b3221b3..d43317a 100644
--- a/graphics/elements/controls/sidebar.lua
+++ b/graphics/elements/controls/sidebar.lua
@@ -1,6 +1,6 @@
 -- Sidebar Graphics Element
 
-local tcd     = require("scada-common.tcallbackdsp")
+local tcd     = require("scada-common.tcd")
 
 local core    = require("graphics.core")
 local element = require("graphics.element")
diff --git a/graphics/elements/listbox.lua b/graphics/elements/listbox.lua
index 87a274d..e37a772 100644
--- a/graphics/elements/listbox.lua
+++ b/graphics/elements/listbox.lua
@@ -1,6 +1,6 @@
 -- Scroll-able List Box Display Graphics Element
 
-local tcd     = require("scada-common.tcallbackdsp")
+local tcd     = require("scada-common.tcd")
 
 local core    = require("graphics.core")
 local element = require("graphics.element")
diff --git a/graphics/flasher.lua b/graphics/flasher.lua
index 0a3d9ea..520fba7 100644
--- a/graphics/flasher.lua
+++ b/graphics/flasher.lua
@@ -2,7 +2,7 @@
 -- Indicator Light Flasher
 --
 
-local tcd = require("scada-common.tcallbackdsp")
+local tcd = require("scada-common.tcd")
 
 local flasher = {}
 
diff --git a/install_manifest.json b/install_manifest.json
index a2f4b51..249b201 100644
--- a/install_manifest.json
+++ b/install_manifest.json
@@ -1 +1 @@
-{"versions": {"installer": "v1.2", "bootloader": "0.2", "comms": "1.4.1", "reactor-plc": "v1.3.6", "rtu": "v1.2.6", "supervisor": "v0.16.6", "coordinator": "v0.15.6", "pocket": "alpha-v0.3.6"}, "files": {"system": ["initenv.lua", "startup.lua"], "common": ["scada-common/crypto.lua", "scada-common/ppm.lua", "scada-common/comms.lua", "scada-common/psil.lua", "scada-common/tcallbackdsp.lua", "scada-common/rsio.lua", "scada-common/constants.lua", "scada-common/mqueue.lua", "scada-common/crash.lua", "scada-common/log.lua", "scada-common/types.lua", "scada-common/util.lua"], "graphics": ["graphics/element.lua", "graphics/events.lua", "graphics/flasher.lua", "graphics/core.lua", "graphics/elements/listbox.lua", "graphics/elements/textbox.lua", "graphics/elements/displaybox.lua", "graphics/elements/pipenet.lua", "graphics/elements/rectangle.lua", "graphics/elements/div.lua", "graphics/elements/multipane.lua", "graphics/elements/tiling.lua", "graphics/elements/colormap.lua", "graphics/elements/indicators/alight.lua", "graphics/elements/indicators/icon.lua", "graphics/elements/indicators/power.lua", "graphics/elements/indicators/rad.lua", "graphics/elements/indicators/state.lua", "graphics/elements/indicators/light.lua", "graphics/elements/indicators/vbar.lua", "graphics/elements/indicators/led.lua", "graphics/elements/indicators/coremap.lua", "graphics/elements/indicators/data.lua", "graphics/elements/indicators/ledpair.lua", "graphics/elements/indicators/hbar.lua", "graphics/elements/indicators/trilight.lua", "graphics/elements/indicators/ledrgb.lua", "graphics/elements/controls/switch_button.lua", "graphics/elements/controls/spinbox_numeric.lua", "graphics/elements/controls/hazard_button.lua", "graphics/elements/controls/push_button.lua", "graphics/elements/controls/radio_button.lua", "graphics/elements/controls/multi_button.lua", "graphics/elements/controls/tabbar.lua", "graphics/elements/controls/sidebar.lua", "graphics/elements/animations/waiting.lua"], "lockbox": ["lockbox/init.lua", "lockbox/LICENSE", "lockbox/kdf/pbkdf2.lua", "lockbox/util/bit.lua", "lockbox/util/array.lua", "lockbox/util/stream.lua", "lockbox/util/queue.lua", "lockbox/digest/sha2_224.lua", "lockbox/digest/sha1.lua", "lockbox/digest/sha2_256.lua", "lockbox/cipher/aes128.lua", "lockbox/cipher/aes256.lua", "lockbox/cipher/aes192.lua", "lockbox/cipher/mode/ofb.lua", "lockbox/cipher/mode/cbc.lua", "lockbox/cipher/mode/ctr.lua", "lockbox/cipher/mode/cfb.lua", "lockbox/mac/hmac.lua", "lockbox/padding/ansix923.lua", "lockbox/padding/pkcs7.lua", "lockbox/padding/zero.lua", "lockbox/padding/isoiec7816.lua"], "reactor-plc": ["reactor-plc/renderer.lua", "reactor-plc/threads.lua", "reactor-plc/databus.lua", "reactor-plc/plc.lua", "reactor-plc/config.lua", "reactor-plc/startup.lua", "reactor-plc/panel/front_panel.lua", "reactor-plc/panel/style.lua"], "rtu": ["rtu/renderer.lua", "rtu/threads.lua", "rtu/rtu.lua", "rtu/databus.lua", "rtu/modbus.lua", "rtu/config.lua", "rtu/startup.lua", "rtu/panel/front_panel.lua", "rtu/panel/style.lua", "rtu/dev/sps_rtu.lua", "rtu/dev/envd_rtu.lua", "rtu/dev/boilerv_rtu.lua", "rtu/dev/redstone_rtu.lua", "rtu/dev/sna_rtu.lua", "rtu/dev/imatrix_rtu.lua", "rtu/dev/turbinev_rtu.lua"], "supervisor": ["supervisor/renderer.lua", "supervisor/databus.lua", "supervisor/supervisor.lua", "supervisor/unit.lua", "supervisor/config.lua", "supervisor/startup.lua", "supervisor/unitlogic.lua", "supervisor/facility.lua", "supervisor/panel/pgi.lua", "supervisor/panel/front_panel.lua", "supervisor/panel/style.lua", "supervisor/panel/components/rtu_entry.lua", "supervisor/panel/components/pdg_entry.lua", "supervisor/session/coordinator.lua", "supervisor/session/svqtypes.lua", "supervisor/session/pocket.lua", "supervisor/session/svsessions.lua", "supervisor/session/rtu.lua", "supervisor/session/plc.lua", "supervisor/session/rsctl.lua", "supervisor/session/rtu/boilerv.lua", "supervisor/session/rtu/txnctrl.lua", "supervisor/session/rtu/unit_session.lua", "supervisor/session/rtu/turbinev.lua", "supervisor/session/rtu/envd.lua", "supervisor/session/rtu/imatrix.lua", "supervisor/session/rtu/sps.lua", "supervisor/session/rtu/qtypes.lua", "supervisor/session/rtu/sna.lua", "supervisor/session/rtu/redstone.lua"], "coordinator": ["coordinator/coordinator.lua", "coordinator/renderer.lua", "coordinator/iocontrol.lua", "coordinator/sounder.lua", "coordinator/config.lua", "coordinator/startup.lua", "coordinator/process.lua", "coordinator/ui/dialog.lua", "coordinator/ui/style.lua", "coordinator/ui/layout/main_view.lua", "coordinator/ui/layout/unit_view.lua", "coordinator/ui/components/reactor.lua", "coordinator/ui/components/processctl.lua", "coordinator/ui/components/unit_overview.lua", "coordinator/ui/components/boiler.lua", "coordinator/ui/components/unit_detail.lua", "coordinator/ui/components/imatrix.lua", "coordinator/ui/components/turbine.lua", "coordinator/session/api.lua", "coordinator/session/apisessions.lua"], "pocket": ["pocket/pocket.lua", "pocket/renderer.lua", "pocket/config.lua", "pocket/coreio.lua", "pocket/startup.lua", "pocket/ui/main.lua", "pocket/ui/style.lua", "pocket/ui/components/conn_waiting.lua", "pocket/ui/pages/turbine_page.lua", "pocket/ui/pages/reactor_page.lua", "pocket/ui/pages/home_page.lua", "pocket/ui/pages/unit_page.lua", "pocket/ui/pages/boiler_page.lua"]}, "depends": {"reactor-plc": ["system", "common", "graphics"], "rtu": ["system", "common", "graphics"], "supervisor": ["system", "common"], "coordinator": ["system", "common", "graphics"], "pocket": ["system", "common", "graphics"]}, "sizes": {"manifest": 5775, "system": 1991, "common": 91102, "graphics": 144082, "lockbox": 100797, "reactor-plc": 95896, "rtu": 100988, "supervisor": 310851, "coordinator": 197544, "pocket": 36338}}
\ No newline at end of file
+{"versions": {"installer": "v1.2", "bootloader": "0.2", "comms": "1.4.1", "reactor-plc": "v1.3.7", "rtu": "v1.2.7", "supervisor": "v0.16.7", "coordinator": "v0.15.7", "pocket": "alpha-v0.3.7"}, "files": {"system": ["initenv.lua", "startup.lua"], "common": ["scada-common/crypto.lua", "scada-common/ppm.lua", "scada-common/comms.lua", "scada-common/psil.lua", "scada-common/rsio.lua", "scada-common/constants.lua", "scada-common/mqueue.lua", "scada-common/tcd.lua", "scada-common/crash.lua", "scada-common/log.lua", "scada-common/types.lua", "scada-common/util.lua"], "graphics": ["graphics/element.lua", "graphics/events.lua", "graphics/flasher.lua", "graphics/core.lua", "graphics/elements/listbox.lua", "graphics/elements/textbox.lua", "graphics/elements/displaybox.lua", "graphics/elements/pipenet.lua", "graphics/elements/rectangle.lua", "graphics/elements/div.lua", "graphics/elements/multipane.lua", "graphics/elements/tiling.lua", "graphics/elements/colormap.lua", "graphics/elements/indicators/alight.lua", "graphics/elements/indicators/icon.lua", "graphics/elements/indicators/power.lua", "graphics/elements/indicators/rad.lua", "graphics/elements/indicators/state.lua", "graphics/elements/indicators/light.lua", "graphics/elements/indicators/vbar.lua", "graphics/elements/indicators/led.lua", "graphics/elements/indicators/coremap.lua", "graphics/elements/indicators/data.lua", "graphics/elements/indicators/ledpair.lua", "graphics/elements/indicators/hbar.lua", "graphics/elements/indicators/trilight.lua", "graphics/elements/indicators/ledrgb.lua", "graphics/elements/controls/switch_button.lua", "graphics/elements/controls/spinbox_numeric.lua", "graphics/elements/controls/hazard_button.lua", "graphics/elements/controls/push_button.lua", "graphics/elements/controls/radio_button.lua", "graphics/elements/controls/multi_button.lua", "graphics/elements/controls/tabbar.lua", "graphics/elements/controls/sidebar.lua", "graphics/elements/animations/waiting.lua"], "lockbox": ["lockbox/init.lua", "lockbox/LICENSE", "lockbox/kdf/pbkdf2.lua", "lockbox/util/bit.lua", "lockbox/util/array.lua", "lockbox/util/stream.lua", "lockbox/util/queue.lua", "lockbox/digest/sha2_224.lua", "lockbox/digest/sha1.lua", "lockbox/digest/sha2_256.lua", "lockbox/cipher/aes128.lua", "lockbox/cipher/aes256.lua", "lockbox/cipher/aes192.lua", "lockbox/cipher/mode/ofb.lua", "lockbox/cipher/mode/cbc.lua", "lockbox/cipher/mode/ctr.lua", "lockbox/cipher/mode/cfb.lua", "lockbox/mac/hmac.lua", "lockbox/padding/ansix923.lua", "lockbox/padding/pkcs7.lua", "lockbox/padding/zero.lua", "lockbox/padding/isoiec7816.lua"], "reactor-plc": ["reactor-plc/renderer.lua", "reactor-plc/threads.lua", "reactor-plc/databus.lua", "reactor-plc/plc.lua", "reactor-plc/config.lua", "reactor-plc/startup.lua", "reactor-plc/panel/front_panel.lua", "reactor-plc/panel/style.lua"], "rtu": ["rtu/renderer.lua", "rtu/threads.lua", "rtu/rtu.lua", "rtu/databus.lua", "rtu/modbus.lua", "rtu/config.lua", "rtu/startup.lua", "rtu/panel/front_panel.lua", "rtu/panel/style.lua", "rtu/dev/sps_rtu.lua", "rtu/dev/envd_rtu.lua", "rtu/dev/boilerv_rtu.lua", "rtu/dev/redstone_rtu.lua", "rtu/dev/sna_rtu.lua", "rtu/dev/imatrix_rtu.lua", "rtu/dev/turbinev_rtu.lua"], "supervisor": ["supervisor/renderer.lua", "supervisor/databus.lua", "supervisor/supervisor.lua", "supervisor/unit.lua", "supervisor/config.lua", "supervisor/startup.lua", "supervisor/unitlogic.lua", "supervisor/facility.lua", "supervisor/panel/pgi.lua", "supervisor/panel/front_panel.lua", "supervisor/panel/style.lua", "supervisor/panel/components/rtu_entry.lua", "supervisor/panel/components/pdg_entry.lua", "supervisor/session/coordinator.lua", "supervisor/session/svqtypes.lua", "supervisor/session/pocket.lua", "supervisor/session/svsessions.lua", "supervisor/session/rtu.lua", "supervisor/session/plc.lua", "supervisor/session/rsctl.lua", "supervisor/session/rtu/boilerv.lua", "supervisor/session/rtu/txnctrl.lua", "supervisor/session/rtu/unit_session.lua", "supervisor/session/rtu/turbinev.lua", "supervisor/session/rtu/envd.lua", "supervisor/session/rtu/imatrix.lua", "supervisor/session/rtu/sps.lua", "supervisor/session/rtu/qtypes.lua", "supervisor/session/rtu/sna.lua", "supervisor/session/rtu/redstone.lua"], "coordinator": ["coordinator/coordinator.lua", "coordinator/renderer.lua", "coordinator/iocontrol.lua", "coordinator/sounder.lua", "coordinator/config.lua", "coordinator/startup.lua", "coordinator/process.lua", "coordinator/ui/dialog.lua", "coordinator/ui/style.lua", "coordinator/ui/layout/main_view.lua", "coordinator/ui/layout/unit_view.lua", "coordinator/ui/components/reactor.lua", "coordinator/ui/components/processctl.lua", "coordinator/ui/components/unit_overview.lua", "coordinator/ui/components/boiler.lua", "coordinator/ui/components/unit_detail.lua", "coordinator/ui/components/imatrix.lua", "coordinator/ui/components/turbine.lua", "coordinator/session/api.lua", "coordinator/session/apisessions.lua"], "pocket": ["pocket/pocket.lua", "pocket/renderer.lua", "pocket/config.lua", "pocket/coreio.lua", "pocket/startup.lua", "pocket/ui/main.lua", "pocket/ui/style.lua", "pocket/ui/components/conn_waiting.lua", "pocket/ui/pages/turbine_page.lua", "pocket/ui/pages/reactor_page.lua", "pocket/ui/pages/home_page.lua", "pocket/ui/pages/unit_page.lua", "pocket/ui/pages/boiler_page.lua"]}, "depends": {"reactor-plc": ["system", "common", "graphics"], "rtu": ["system", "common", "graphics"], "supervisor": ["system", "common"], "coordinator": ["system", "common", "graphics"], "pocket": ["system", "common", "graphics"]}, "sizes": {"manifest": 5766, "system": 1991, "common": 91039, "graphics": 144028, "lockbox": 100797, "reactor-plc": 95846, "rtu": 101207, "supervisor": 310842, "coordinator": 197505, "pocket": 36280}}
\ No newline at end of file
diff --git a/pocket/startup.lua b/pocket/startup.lua
index 50862d1..32d4737 100644
--- a/pocket/startup.lua
+++ b/pocket/startup.lua
@@ -4,20 +4,20 @@
 
 require("/initenv").init_env()
 
-local crash        = require("scada-common.crash")
-local log          = require("scada-common.log")
-local ppm          = require("scada-common.ppm")
-local tcallbackdsp = require("scada-common.tcallbackdsp")
-local util         = require("scada-common.util")
+local crash    = require("scada-common.crash")
+local log      = require("scada-common.log")
+local ppm      = require("scada-common.ppm")
+local tcd      = require("scada-common.tcd")
+local util     = require("scada-common.util")
 
-local core         = require("graphics.core")
+local core     = require("graphics.core")
 
-local config       = require("pocket.config")
-local coreio       = require("pocket.coreio")
-local pocket       = require("pocket.pocket")
-local renderer     = require("pocket.renderer")
+local config   = require("pocket.config")
+local coreio   = require("pocket.coreio")
+local pocket   = require("pocket.pocket")
+local renderer = require("pocket.renderer")
 
-local POCKET_VERSION = "alpha-v0.3.6"
+local POCKET_VERSION = "alpha-v0.3.7"
 
 local println = util.println
 local println_ts = util.println_ts
@@ -145,7 +145,7 @@ local function main()
                 else
                     -- a non-clock/main watchdog timer event
                     -- notify timer callback dispatcher
-                    tcallbackdsp.handle(param1)
+                    tcd.handle(param1)
                 end
             elseif event == "modem_message" then
                 -- got a packet
diff --git a/reactor-plc/startup.lua b/reactor-plc/startup.lua
index 3e8861b..812ed45 100644
--- a/reactor-plc/startup.lua
+++ b/reactor-plc/startup.lua
@@ -18,7 +18,7 @@ local plc      = require("reactor-plc.plc")
 local renderer = require("reactor-plc.renderer")
 local threads  = require("reactor-plc.threads")
 
-local R_PLC_VERSION = "v1.3.6"
+local R_PLC_VERSION = "v1.3.7"
 
 local println = util.println
 local println_ts = util.println_ts
diff --git a/reactor-plc/threads.lua b/reactor-plc/threads.lua
index 8dbea6d..b9c986d 100644
--- a/reactor-plc/threads.lua
+++ b/reactor-plc/threads.lua
@@ -1,13 +1,13 @@
-local log          = require("scada-common.log")
-local mqueue       = require("scada-common.mqueue")
-local ppm          = require("scada-common.ppm")
-local tcallbackdsp = require("scada-common.tcallbackdsp")
-local util         = require("scada-common.util")
+local log      = require("scada-common.log")
+local mqueue   = require("scada-common.mqueue")
+local ppm      = require("scada-common.ppm")
+local tcd      = require("scada-common.tcd")
+local util     = require("scada-common.util")
 
-local databus      = require("reactor-plc.databus")
-local renderer     = require("reactor-plc.renderer")
+local databus  = require("reactor-plc.databus")
+local renderer = require("reactor-plc.renderer")
 
-local core         = require("graphics.core")
+local core     = require("graphics.core")
 
 local threads = {}
 
@@ -157,7 +157,7 @@ function threads.thread__main(smem, init)
                 smem.q.mq_rps.push_command(MQ__RPS_CMD.TRIP_TIMEOUT)
             elseif event == "timer" then
                 -- notify timer callback dispatcher if no other timer case claimed this event
-                tcallbackdsp.handle(param1)
+                tcd.handle(param1)
             elseif event == "peripheral_detach" then
                 -- peripheral disconnect
                 local type, device = ppm.handle_unmount(param1)
diff --git a/rtu/startup.lua b/rtu/startup.lua
index 86c3db2..451a06d 100644
--- a/rtu/startup.lua
+++ b/rtu/startup.lua
@@ -28,7 +28,7 @@ local sna_rtu      = require("rtu.dev.sna_rtu")
 local sps_rtu      = require("rtu.dev.sps_rtu")
 local turbinev_rtu = require("rtu.dev.turbinev_rtu")
 
-local RTU_VERSION = "v1.2.6"
+local RTU_VERSION = "v1.2.7"
 
 local RTU_UNIT_TYPE = types.RTU_UNIT_TYPE
 local RTU_UNIT_HW_STATE = databus.RTU_UNIT_HW_STATE
diff --git a/rtu/threads.lua b/rtu/threads.lua
index 046525c..fdb82b3 100644
--- a/rtu/threads.lua
+++ b/rtu/threads.lua
@@ -1,6 +1,7 @@
 local log          = require("scada-common.log")
 local mqueue       = require("scada-common.mqueue")
 local ppm          = require("scada-common.ppm")
+local tcd          = require("scada-common.tcd")
 local types        = require("scada-common.types")
 local util         = require("scada-common.util")
 
@@ -82,6 +83,9 @@ function threads.thread__main(smem)
             elseif event == "timer" and conn_watchdog.is_timer(param1) then
                 -- haven't heard from server recently? unlink
                 rtu_comms.unlink(rtu_state)
+            elseif event == "timer" then
+                -- notify timer callback dispatcher if no other timer case claimed this event
+                tcd.handle(param1)
             elseif event == "peripheral_detach" then
                 -- handle loss of a device
                 local type, device = ppm.handle_unmount(param1)
diff --git a/scada-common/tcallbackdsp.lua b/scada-common/tcd.lua
similarity index 91%
rename from scada-common/tcallbackdsp.lua
rename to scada-common/tcd.lua
index 3f8f07a..f5ff0e5 100644
--- a/scada-common/tcallbackdsp.lua
+++ b/scada-common/tcd.lua
@@ -5,14 +5,14 @@
 local log  = require("scada-common.log")
 local util = require("scada-common.util")
 
-local tcallbackdsp = {}
+local tcd = {}
 
 local registry = {}
 
 -- request a function to be called after the specified time
 ---@param time number seconds
 ---@param f function callback function
-function tcallbackdsp.dispatch(time, f)
+function tcd.dispatch(time, f)
     local timer = util.start_timer(time)
     registry[timer] = {
         callback = f,
@@ -24,7 +24,7 @@ end
 -- request a function to be called after the specified time, aborting any registered instances of that function reference
 ---@param time number seconds
 ---@param f function callback function
-function tcallbackdsp.dispatch_unique(time, f)
+function tcd.dispatch_unique(time, f)
     -- cancel if already registered
     for timer, entry in pairs(registry) do
         if entry.callback == f then
@@ -47,7 +47,7 @@ end
 
 -- abort a requested callback
 ---@param f function callback function
-function tcallbackdsp.abort(f)
+function tcd.abort(f)
     for timer, entry in pairs(registry) do
         if entry.callback == f then
             -- cancel event and remove from registry (even if it fires it won't call)
@@ -59,7 +59,7 @@ end
 
 -- lookup a timer event and execute the callback if found
 ---@param event integer timer event timer ID
-function tcallbackdsp.handle(event)
+function tcd.handle(event)
     if registry[event] ~= nil then
         local callback = registry[event].callback
         -- clear first so that dispatch_unique call from inside callback won't throw a debug message
@@ -70,7 +70,7 @@ end
 
 -- identify any overdo callbacks<br>
 -- prints to log debug output
-function tcallbackdsp.diagnostics()
+function tcd.diagnostics()
     for timer, entry in pairs(registry) do
         if entry.expiry < util.time_s() then
             local overtime = util.time_s() - entry.expiry
@@ -82,4 +82,4 @@ function tcallbackdsp.diagnostics()
     end
 end
 
-return tcallbackdsp
+return tcd
diff --git a/supervisor/startup.lua b/supervisor/startup.lua
index 06853ef..c3f28ad 100644
--- a/supervisor/startup.lua
+++ b/supervisor/startup.lua
@@ -8,7 +8,7 @@ local crash      = require("scada-common.crash")
 local comms      = require("scada-common.comms")
 local log        = require("scada-common.log")
 local ppm        = require("scada-common.ppm")
-local tcd        = require("scada-common.tcallbackdsp")
+local tcd        = require("scada-common.tcd")
 local util       = require("scada-common.util")
 
 local core       = require("graphics.core")
@@ -20,7 +20,7 @@ local supervisor = require("supervisor.supervisor")
 
 local svsessions = require("supervisor.session.svsessions")
 
-local SUPERVISOR_VERSION = "v0.16.6"
+local SUPERVISOR_VERSION = "v0.16.7"
 
 local println = util.println
 local println_ts = util.println_ts