Problems in log file

Hello, i am getting some error messages in my Asterisk log file, which i would like to clear. The system is running ok with 8 Polycom IP430 connected to it, however i am experiencing some outbound busy signals randomly. When this occurs no one can dial out,the service does come back after a few minutes. When all of this outbound disruption occurs the log gives more of the “Remote host can’t match request NOTIFY to call”

Here it is the log:

[Oct 29 16:28:34] NOTICE[7291] cdr.c: CDR simple logging enabled.
[Oct 29 16:28:34] NOTICE[7291] res_odbc.c: Adding ENV var: INFORMIXSERVER=my_special_database
[Oct 29 16:28:34] NOTICE[7291] res_odbc.c: Adding ENV var: INFORMIXDIR=/opt/informix
[Oct 29 16:28:34] ERROR[7291] res_config_pgsql.c: Postgresql RealTime: Failed to connect database server asterisk on 127.0.0.1. Check debug for more info.
[Oct 29 16:28:34] WARNING[7291] res_config_pgsql.c: Postgresql RealTime: Couldn’t establish connection. Check debug.
[Oct 29 16:28:34] NOTICE[7291] indications.c: Removed default indication country ‘us’
[Oct 29 16:28:34] WARNING[7291] res_smdi.c: No SMDI interfaces were specified to listen on, not starting SDMI listener.
[Oct 29 16:28:34] WARNING[7291] pbx.c: Unable to register extension ‘7005’, priority 1 in ‘default’, already in use
[Oct 29 16:28:34] WARNING[7291] pbx_config.c: Unable to include context ‘default’ in context ‘voicemenu-custom-3’
[Oct 29 16:28:34] NOTICE[7291] app_playback.c: Reloading say.conf
[Oct 29 16:28:34] WARNING[7291] app_queue.c: Unknown keyword in queue ‘0001’: fullname at line 52 of queues.conf
[Oct 29 16:28:34] WARNING[7291] app_queue.c: Unknown keyword in queue ‘0002’: fullname at line 69 of queues.conf
[Oct 29 16:28:34] NOTICE[7291] pbx_ael.c: Starting AEL load process.
[Oct 29 16:28:34] NOTICE[7291] pbx_ael.c: AEL load process: calculated config file name ‘/etc/asterisk/extensions.ael’.
[Oct 29 16:28:34] NOTICE[7291] pbx_ael.c: AEL load process: parsed config file name ‘/etc/asterisk/extensions.ael’.
[Oct 29 16:28:34] NOTICE[7291] pbx_ael.c: AEL load process: checked config file name ‘/etc/asterisk/extensions.ael’.
[Oct 29 16:28:34] NOTICE[7291] pbx_ael.c: AEL load process: compiled config file name ‘/etc/asterisk/extensions.ael’.
[Oct 29 16:28:34] NOTICE[7291] pbx_ael.c: AEL load process: merged config file name ‘/etc/asterisk/extensions.ael’.
[Oct 29 16:28:34] NOTICE[7291] pbx_ael.c: AEL load process: verified config file name ‘/etc/asterisk/extensions.ael’.

[Oct 29 12:34:12] WARNING[6145] chan_zap.c: Ignoring switchtype
[Oct 29 12:34:12] WARNING[6145] chan_zap.c: Ignoring signalling
[Oct 29 12:34:12] WARNING[6145] chan_zap.c: Ignoring trunkname
[Oct 29 12:34:12] WARNING[6145] chan_zap.c: Ignoring trunkstyle
[Oct 29 12:34:12] WARNING[6145] chan_zap.c: Ignoring hassip
[Oct 29 12:34:12] WARNING[6145] chan_zap.c: Ignoring hasiax
[Oct 29 12:34:12] WARNING[6145] chan_misdn.c: chan_misdn is not initialized properly, still reloading ?
[Oct 29 12:34:15] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘396d543f-d7d4e5e0-cca8a9@192.168.16.38’. Giving up.
[Oct 29 12:34:16] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘9315bdce-768c97bd-1a6a5ad8@192.168.16.41’. Giving up.
[Oct 29 12:34:17] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘e355741e-6ae9a12f-c1e35f54@192.168.16.39’. Giving up.
[Oct 29 12:34:19] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘3e60a19a-93132f33-2bdab0f8@192.168.16.30’. Giving up.
[Oct 29 12:34:20] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘1a8e2894-19ac7bef-298d5932@192.168.16.37’. Giving up.
[Oct 29 12:34:21] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘1c2955ba-46ad1ae7-ba53d5e0@192.168.16.44’. Giving up.
[Oct 29 12:34:21] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘8192d030-4d6ac963-ce7dc02@192.168.16.42’. Giving up.
[Oct 29 12:36:53] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘3e60a19a-93132f33-2bdab0f8@192.168.16.30’. Giving up.
[Oct 29 12:49:35] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘396d543f-d7d4e5e0-cca8a9@192.168.16.38’. Giving up.
[Oct 29 12:51:15] WARNING[3873] chan_sip.c: Remote host can’t match request NOTIFY to call ‘e355741e-6ae9a12f-c1e35f54@192.168.16.39’. Giving up.

Thanks you.