Syntax

SETDefault !<path> -PAth CLock = TestMode | External | Internal | Auto

SHow [!<path> | !*] -PAth CLock

SHowDefault [!<path> | !*] -PAth CLock

External

Description

The CLock parameter determines how the bridge/router derives its transmit clock. This parameter applies only to serial interfaces. For the new value to take effect on all NETBuilder bridge/routers except the OfficeConnect models, you must re-enable the corresponding path.

On OfficeConnect NETBuilder bridge/routers, SuperStack II NETBuilder SI bridge/routers, and Flex WAN modules for NETBuilder II bridge/routers, clocking is detected automatically through the Flex-WAN cable; you cannot set clocking on the Flex-WAN port.

Values

TestMode	Indicates the bridge/router derives the transmit clock from the on-board clock oscillator. TestMode does not support all baud rates. You cannot use the TestMode setting when you are configuring SuperStack II NETBuilder bridge/routers or NETBuilder II HSS V.35 3-Port WAN interfaces. This value does not apply to SuperStack II NETBuilder bridge/router models 32x, 52x, SuperStack II SI NETBuilder bridge/routers, and OfficeConnect NETBuilder bridge/routers.
Internal	Indicates the bridge/router derives both the transmit and receive clocks from the on-board clock oscillator. This value applies to SuperStack II NETBuilder bridge/router (models 32x and 52x only). It also applies to a NETBuilder II HSS RS-232 3-Port DTE/DCE module if you change one of the module ports to DCE so that the port can connect to a DTE device.
External	Indicates the bridge/router derives the transmit clock from the send or receive timing clock supplied by the digital service unit/channel service unit (DSU/CSU); by an attached modem; or for a NETBuilder II bridge/routers by an attached WAN Extender. For NETBuilder II bridge/routers deriving their transmit clock from a WAN Extender, the physical path of the NETBuilder II bridge/router has the clock set to External and not the virtual paths provided by the WAN Extender.
Auto	Indicates the default setting for the OfficeConnect NETBuilder bridge/router Flex-WAN cable. Clocking is detected automatically when this connector is attached and cannot be set by the user.

You must change the path clock setting from External to Internal if you change the port on the HSS RS-232 3-Port DTE/DCE module to DCE to connect to a DTE device. If you change this setting, you must also use a different cable. For more information, see the WAN Cabling and Connectivity Guide. You can find this guide on the 3Com Corporation World Wide Web site by entering: http://www.3com.com/.

The CLock parameter displays a "Not Set" value for Ethernet paths, WAN Extender virtual paths, and empty slots on all NETBuilder bridge/routers except the OfficeConnect models. For OfficeConnect NETBuilder bridge/routers, the CLock parameter displays "Auto" if no Flex-WAN connector is attached.