you could compare the sip.conf from the old to the new and see if there is anything related to volume.
I dont found anything related to volume.
also be sure the codec is the same as you were using before (and are using the same codec as the "other dialer").
On the other dialer we are using g729 codec and same we are using with goautodial.
failing that, of course, do try ulaw/gsm and anything else that both the phone and the asterisk server speak to see if that helps.
I have tried changing the codec to alaw. And in my 5 hrs of shift there were not volume issue. Still we are checking. If I will get volume issue again or not.
Below is my top output :
[root@localhost astguiclient]# top
top - 20:38:32 up 1 day, 6:13, 3 users, load average: 2.53, 2.14, 2.28
Tasks: 178 total, 1 running, 174 sleeping, 0 stopped, 3 zombie
Cpu0 : 39.5%us, 8.3%sy, 0.0%ni, 51.2%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
Cpu1 : 35.2%us, 9.3%sy, 0.0%ni, 51.2%id, 0.7%wa, 0.7%hi, 3.0%si, 0.0%st
Mem: 8179000k total, 1071352k used, 7107648k free, 6252k buffers
Swap: 10223608k total, 0k used, 10223608k free, 221144k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2889 mysql 15 0 976m 339m 4936 S 15.9 4.3 95:38.38 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql
13392 root 18 0 2344m 89m 6168 S 15.6 1.1 88:33.28 asterisk
25520 root 15 0 75008 9784 2820 S 4.0 0.1 4:42.01 /usr/bin/perl /usr/share/astguiclient/AST_update.pl
26372 root 19 0 32940 6124 1748 S 2.3 0.1 0:00.07 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26398 root 24 0 32940 6120 1748 S 2.3 0.1 0:00.07 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26368 root 18 0 32940 6124 1748 S 2.0 0.1 0:00.06 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26376 root 19 0 32940 6128 1748 S 2.0 0.1 0:00.06 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26383 root 21 0 32936 6124 1748 S 2.0 0.1 0:00.06 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26385 root 22 0 32940 6124 1748 S 2.0 0.1 0:00.06 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26387 root 23 0 32940 6124 1748 S 2.0 0.1 0:00.06 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26370 root 17 0 32940 6128 1748 S 1.7 0.1 0:00.05 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26381 root 21 0 32936 6128 1748 S 1.7 0.1 0:00.05 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
26392 root 23 0 32940 6128 1748 S 1.7 0.1 0:00.05 /usr/bin/perl /usr/share/astguiclient/AST_send_action_child.pl --SYSLOG
13500 root 15 0 76244 14m 2736 S 1.3 0.2 9:54.85 /usr/bin/perl /usr/share/astguiclient/AST_VDauto_dial.pl
9941 apache 15 0 322m 21m 12m S 1.0 0.3 0:20.97 /usr/sbin/httpd
9947 apache 15 0 322m 20m 11m S 1.0 0.3 0:20.98 /usr/sbin/httpd
9948 apache 15 0 322m 21m 12m S 1.0 0.3 0:20.98 /usr/sbin/httpd
13497 root 19 0 68164 6924 2740 S 1.0 0.1 3:41.41 /usr/bin/perl /usr/share/astguiclient/AST_manager_send.pl
14992 apache 15 0 321m 19m 11m S 1.0 0.2 0:14.63 /usr/sbin/httpd
19147 apache 15 0 321m 16m 8584 S 1.0 0.2 0:08.34 /usr/sbin/httpd
19314 apache 15 0 321m 14m 7124 S 1.0 0.2 0:07.99 /usr/sbin/httpd
22558 apache 15 0 321m 14m 7228 S 1.0 0.2 0:03.77 /usr/sbin/httpd
9755 apache 15 0 321m 20m 11m S 0.7 0.3 0:21.02 /usr/sbin/httpd
13927 apache 15 0 321m 21m 12m S 0.7 0.3 0:16.39 /usr/sbin/httpd
14876 root 15 0 12740 1180 804 S 0.7 0.0 0:05.59 top
15198 apache 15 0 321m 20m 11m S 0.7 0.3 0:14.37 /usr/sbin/httpd
22553 apache 15 0 321m 14m 6968 S 0.7 0.2 0:03.66 /usr/sbin/httpd
22557 apache 15 0 321m 19m 11m S 0.7 0.2 0:03.74 /usr/sbin/httpd
13502 root 15 0 74888 9544 2816 S 0.3 0.1 1:44.84 /usr/bin/perl /usr/share/astguiclient/AST_manager_listen.pl
14883 apache 15 0 321m 20m 12m S 0.3 0.3 0:14.78 /usr/sbin/httpd
18551 root 15 0 81252 10m 1540 S 0.3 0.1 0:00.74 /usr/bin/perl /usr/share/astguiclient/FastAGI_log.pl --debug
23630 root 15 0 86972 25m 2712 S 0.3 0.3 4:32.31 /usr/bin/perl /usr/share/astguiclient/AST_VDadapt.pl --debug
25127 root 15 0 90108 3360 2604 S 0.3 0.0 0:02.66 sshd: root@pts/10
25664 root 15 0 12740 1172 804 R 0.3 0.0 0:00.35 top
1 root 15 0 10348 688 576 S 0.0 0.0 0:06.31 init [5]