Previously we have purchase a number of Cisco switches using Liteon power supply (model number: PA-1251-3A-LF) and our system main power supply is designed based on this Liteon power supply. Currently we received another batch of Cisco switches using Delta electronics power supply (DPS-250AB-86 A) and our system main power supply is unable to handle the high in-rush current from Delta power supply which causes the access switch unable to start up. Is there any replacement power supply from Liteon that can be used for in this case? Or the Delta power supply in-rush current be reduced? Please advise. Thanks.