web statisticsweb stats

Business Phone Systems

Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Jun 2007
Posts: 153
Member
Member
Joined: Jun 2007
Posts: 153
I've got a customer that has SIP trunks on a IPO 9.0 Partner edition. They are saying that they can make outgoing calls but can't receive incoming calls. When you call their main number you hear the message that “you have reached a nonworking number. Announcement 14 switch 18-3.”. Their SIP provider is Allied and they are saying that there’s a routing issue with the PBX. They’re getting 503 service unavailable errors to their SBC. There have been no configuration changes so says the customer. I will be comparing the original cfg file saved to my laptop to their current cfg to make sure. The customer also said that now it seems they are able to receive calls for about 30 minutes and then it goes back down. This pattern repeats itself throughout the day. My questions are has anyone experienced this issue before and where do I begin to troubleshoot? I checked alarms and there are none. Strange. Thanks for any help you can give.


Larry

Authorized Avaya Business Partner
Avaya IP Office Help & Support Website
IP Office Help

Avaya IP Office Help & Support Website


FAQs, documentation, videos, updates, and support for the Avaya IP Office business phone system!
Everything you need to know about installing, upgrading, and troubleshooting IP 500v2 and IPO Server Edition systems.

Joined: Mar 2014
Posts: 160
Member
*****
Member
*****
Offline
Joined: Mar 2014
Posts: 160
Never tried SIP lines on AVAYA before.

But I think it might be a SIP trunk keep-alive issue.
every time when make outgoing call, phone system will talk with ISP SIP server. But ISP SIP server could not find phone system when keep-alive timer times out and the SIP link is not active.

You might check SIP trunks settings, or similar settings on local router/firewall.

Joined: Aug 2004
Posts: 1,743
Likes: 49
Admin
*****
Admin
*****
Joined: Aug 2004
Posts: 1,743
Likes: 49
The router likely needs to be setup to forward port 5060 to the internal address of the IPO. You'll want to restrict it so it only forwards traffic from the VoIP provider's public IP.


[Linked Image from web.atcomsystems.ca]
Looking for a VoIP Phone Canada provider? Put Atcom's valuable VoIP expertise to work for your business today!
Joined: May 2004
Posts: 1,668
Likes: 4
Moderator-Avaya
*****
Moderator-Avaya
*****
Joined: May 2004
Posts: 1,668
Likes: 4
If you upgrade them to Essential, you would be able to set up STUN, which, depending on the provider, could solve the issue.

Joined: Jun 2007
Posts: 153
Member
Member
Joined: Jun 2007
Posts: 153
It seems that the URI somehow changed although the customer doesn't have manager installed and couldn't have changed it. The provider says they didn't change anything so WTH. Anyway changed it back to the provider settings and everything is up and running again. Thanks for the helpful suggestions.


Larry

Authorized Avaya Business Partner

Link Copied to Clipboard
Newest Topics
Samsung xchange server
by scanjet - 04/07/25 06:37 PM
NEC IP Phones
by juno - 04/04/25 09:05 AM
NEC IP phones rebooting
by jpet621 - 04/03/25 03:03 PM
SV9100 store hours mailbox
by muddybl - 04/03/25 02:10 PM
Forum Statistics
Forums84
Topics94,513
Posts639,938
Members49,844
Most Online5,661
May 23rd, 2018
Newest Members
yeloshak, ty3995, Sippy, sersmith, Taddeo
49,844 Registered Users
Top Posters(30 Days)
Toner 8
Taddeo 5
dexman 3
C5Z 2
Who's Online Now
1 members (justbill), 165 guests, and 47 robots.
Key: Admin, Global Mod, Mod
Contact Us | Sponsored by Atcom: One of the best VoIP Phone Canada Suppliers for your business telephone system!| Terms of Service

Sundance Communications is not affiliated with any of the above manufacturers. Sundance Phone System Forums - VOIP & Cloud Phone Help
©Copyright Sundance Communications 1998 - 2025
Powered by UBB.threads™ PHP Forum Software 8.0.0