Existing CUCM ( 8.6 ), VoiceGateway is MGCP--- - E1 voice gateway with out voice gateway version c3900-universalk9-mz.SPA. 151-4 per cent. M6. bin,VG202 version vg20x-ipvoice-mz. 150-1 per cent.M9. Bin ; the questions : the Send is erro ,the Receiv...