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Remote SIP .... after few minutes become...UNREACHABLE !
Hi everybody !
I had 1 asterisk box (CentOS 5.0, Asterisk 1.4.18, FreePBX 2.4.0) ... work perfect !
All of SIP client in local network is no problem when register with Asterisk box.
But the problem happen with Remote SIP :
1. The Asterisk box has been NAT (ports : 5060, 10000 - 20000, 22, 80)
2. Softphone register from outside is OK .. and work !
3. Then I used 10 IP-Phone (Grandstrem GXP-2000) register with Asterisk box from outside, All of IP-Phone is registed and work about only 5 minutes. But after that all the status of IP-Phones has been change from .... OK ...... to .......... UNRECHABLE !
As follow :
SIP in Local network :
http://pbx.eps.com.vn/ltnhan/software/images/localsip.JPG
Remote SIP register OK :
http://pbx.eps.com.vn/ltnhan/software/images/Remotesip.JPG
After 4-5 minutes .. become UNREACHABLE :
http://pbx.eps.com.vn/ltnhan/software/images/Unreachable.JPG
I don't understand why ? pls give me any ideas about this problem !
Thanks for all !
====== Contact info ==========
Name : Lam The Nhan (Steven)
E-mail : lamthenhan@gmail.com | yahoo.com
Mobile phone No. : +84 918633646
Home phone No. : +84 9402331
==========================
lamthenhan, On most systems
lamthenhan,
On most systems the Sip registration period is 300 seconds or 5 minutes. So what has happened is that the phone has not re-registered. One reason might be that the remote phone is also behind a Firewall and might need port UDP 5060 opened up and forwarded. On some older firewalls this is needed. You also might want to search the forums as I think there are several posts on using the Grandstrem GXP-2000 phones. I don't use those so don't know of any issues but if thee are others I'm sure have posted about it.
Also check that the extension settings have nat=yes set. Another fix for some is to decrease the sip registration period. A side effect of this is that you will a slight increase in traffic as it will be sending more registration information back and forth more often.
Re : On Most System !
Hi fskrotzki,
Thanks for reply. I has been google search so much but can't find any post about this problem.
But you know that I can use Softphone X-Lite registed and work perfect ! But have probem with IP-Phone Grandstream ... that mean anything about ports 5060, 10000-20000 is OK.
OK. Let me check again.
Thank so much,
====== Contact info ==========
Name : Lam The Nhan (Steven)
E-mail : lamthenhan@gmail.com | yahoo.com
Mobile phone No. : +84 918633646
Home phone No. : +84 9402331
==========================