AS5300 as voice trunk between elastix

I have cisco as5300 , want to configure it to work voip trunk between my elastix server. cisco : Router#sh ver Cisco Internetwork Operating System Software IOS (tm) 5300 Software (C5300-JS-M), Version 12.3(18), RELEASE SOFTWARE (fc3) Technical Support: [login to view URL] Copyright (c) 1986-2006 by cisco Systems, Inc. Compiled Wed 15-Mar-06 16:39 by dchih Image text-base: 0x60008AEC, data-base: 0x618EC000 ROM: System Bootstrap, Version 12.0(2)XD1, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1) BOOTLDR: 5300 Software (C5300-BOOT-M), Version 12.1(17), RELEASE SOFTWARE (fc1) Router uptime is 22 hours, 36 minutes System returned to ROM by reload at 00:01:53 UTC Sat Jan 1 2000 System image file is "flash:[login to view URL]" cisco AS5300 (R4K) processor (revision A.32) with 131072K/16384K bytes of memory. Processor board ID 14898234 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). --More-- *Jan 1 22:36:19.798: %SYS-5-CONFIG_I: Configured from console by console *Jan 1 22:36:59.866: %RPS-3-MULTFAIL: There is more than one failure with the Redundant Power System; please resolve problems iTN3270 Emulation software. Primary Rate ISDN software, Version 1.1. Backplane revision 2 Manufacture Cookie Info: EEPROM Type 0x0001, EEPROM Version 0x01, Board ID 0x30, Board Hardware Version 1.80, Item Number 800-2544-03, Board Revision A0, Serial Number 14898234, PLD/ISP Version 0.0, Manufacture Date 8-Jul-1999. 1 Ethernet/IEEE 802.3 interface(s) 1 FastEthernet/IEEE 802.3 interface(s) 4 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) Configuration register is 0x2102