Dialogic Voice Cards - Power Budgeting Jumper Settings for JCT PCI Express Boards

Symptom

PCI Express versions of Dialogic JCT Media Boards (belonging to the Dialogic® HMP Interface Board family) may not be powered correctly depending on which size slot and which specific power budgeting jumper settings are made. If this is the case, the board may be detected by the operating system (e.g. Windows Device Manager) but it may not be detected by the Dialogic System Release software or it may not be possible to start the board.

Reason for the issue

Power budgeting provides a mechanism to enable a system to negotiate power consumption requirements for add-in devices. However, implementation of power budgeting on a vendor's system is not a PCI Express compliance requirement. Therefore, some chassis support the feature while others do not. 

Fix / Solution

PCI Express Dialogic JCT Media Boards are full length x1 form factor PCI Express boards that require 25W of power. PCI Express slots are are defined as x1, x4, x8, x16, ... etc., and refer to maximum transfer speed the slot can provide. Each of these slots provides a certain maximum amount of power by default, e.g. an x1 PCIExpress slot provides a maximum of 10W of power by default. The JCT PCI Express board must be installed in a slot that can be allocated 25W. 

If Power Budgeting is not implemented by a vendor's system, the PCI Express board must be plugged into a x4 or higher slot with the power budgeting jumper in position 1-2 (i.e. power budgeting ignored). This is allowed according to PCI Express Card Electromechanical Specification Revision 1.0a or higher because a x4 or greater slot must be able to support a minimum of 25W. 

If Power Budgeting is implemented by a vendor's system, the PCI Express board can be plugged into a x1 slot but the power budgeting jumper on that board must be in position pins 2-3 (i.e. power budgeting adhered to). According to PCI Express Card Electromechanical Specification Revision 1.0a or higher, a x1 add-in card can draw no more than 10W in a x1 slot unless the board’s required power is successfully negotiated and allocated by the system (power budgeting). However, implementation of power budgeting by a vendor's system is not a compliance requirement per the PCI Express Card Electromechanical Specification Revision 1.0a or higher. Therefore, some chassis may not support this feature. The power budgeting jumper on the board is designed to ensure proper configuration of the product.

For PCIExpress Dialogic JCT Media Boards the power budgeting is configured using jumper P3.

Product List

All PCI Express Dialogic®  JCT Media Boards