[Serusers] SER X AS5300

I have one AS5300 with : Cisco Internetwork Operating System Software IOS (tm) 5300 Software (C5300-JS-M), Version 12.1(1)T, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2000 by cisco Systems, Inc. Compiled Sun 19-Mar-00 01:19 by ccai Image text-base: 0x600088F8, data-base: 0x61150000 ROM: System Bootstrap, Version 11.2(9)XA, RELEASE SOFTWARE (fc2) BOOTFLASH: 5300 Software (C5300-BOOT-M), Version 12.0(4)T1, RELEASE SOFTWARE () tahoGWPSTNUDI uptime is 3 minutes System returned to ROM by reload at 00:06:02 UTC Sat Jan 1 2000 System image file is "flash:c5300-js-mz.121-1.T" cisco AS5300 (R4K) processor (revision A.32) with 65536K/16384K bytes of memory. Processor board ID 10080984 R4700 CPU at 150Mhz, Implementation 33, Rev 1.0, 512KB L2 Cache Channelized E1, Version 1.0. Bridging software. X.25 software, Version 3.0.0. SuperLAT software (copyright 1990 by Meridian Technology Corp). TN3270 Emulation software. Primary Rate ISDN software, Version 1.1Backplane revision 2 Manufacture Cookie Info: EEPROM Type 0x0001, EEPROM Version 0x01, Board ID 0x30, Board Hardware Version 3.2, Item Number 73-2414-6, Board Revision C0, Serial Number 10080984, PLD/ISP Version 255.255, Manufacture Date 14-Oct-1998. 1 Ethernet/IEEE 802.3 interface(s) 1 FastEthernet/IEEE 802.3 interface(s) 35 Serial network interface(s) 240 terminal line(s) 8 Channelized E1/PRI port(s) 128K bytes of non-volatile configuration memory. 16384K bytes of processor board System flash (Read/Write) 8192K bytes of processor board Boot flash (Read/Write) Directory of flash:/ 1 -rw- 9358184 <no date> c5300-js-mz.121-1.T 2 -rw- 465798 <no date> pw.2711.ios but i can't configure codecs i enter into voice-class e enter preference codec but don't accept somebody know with more need me . thks a lot Welesley Sibelson Dias