One of our router is connecting to IP phones via FXO voice-port. The user found that they cannot make a phone several call every months. During the problem, users can only heard busy tone from the phone. Once the user reported, we will enter the following commands to resolve the problem:
Anyone can help in this case? Is it software bugs for voice-port?
Cisco IOS Software, 2800 Software (C2800NM-ENTSERVICESK9-M), Version 12.4(23), RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Sat 08-Nov-08 21:57 by prod_rel_team
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
Cisco 2811 (revision 53.51) with 512000K/12288K bytes of memory.
2 FastEthernet interfaces
2 Serial(sync/async) interfaces
1 ISDN Basic Rate interface
8 Voice FXO interfaces
4 Voice FXS interfaces
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
255488K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102