Ademas of the coneccions sincronas and asincronas, that another difference has between these modulos?NM-4A/S ans NM-4T

System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)Copyright (c) 1999 by cisco Systems, Inc.TAC:Home:SW:IOS:Specials for info*** Machine Check Exception ***PC = 0xfff210c8, Vector = 0x200, SP = 0x680127c8led of activity greenled of power gr...