Software :: VOIP Asterisk As Enterprise Phone System?
Oct 26, 2010
Today my boss come to me and ask me to get a cote to upgrade our old "Cisco call manager" (2004) now "Cisco Unified Communications Manager". So I was wondering, instead of doing a costly upgrade (over 35 000�), maybe it's time to change... Does anyone of you got some insight with Asterisk in an enterprise environment? Is it reliable? Following you own judgement, what are the + and - ? If Asterix worth it, what argument (apart of the price) could I use to help the management turning on my side? Will the Cisco 7921 VOIP phone will be able to connect to it? (as we do have over 35 of them)
Enterprise environment:
- 3 sites (VPN interconnected)
- ~35 VOIP phones and ~10 landlines phones
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Jun 5, 2010
I have two asterisk servers each one behind a linux firewall/gw. Linux is Centos 5.4, kernel 2.6.18-164.el5, iptables v1.3.5. Routes on the fws are ok and when iptables is stoped the servers are see each other, all good. But when I run iptables script in any fw, one server (not always the same) goes unreachable. I verify this with asterisk -r, then show sip trunk, and status becomes UNREACHABLE.
Iptables scripts is generated by fwbuilder. The weird part is I put only one rule to de script and it looks like Source=any, Destination=any, Service=any, Interface=any, Direction (Inbound,Outbound)=any, Time=Any, Action=ACCEPT. So as you can see I tried something like "Do not do anything at all". But anyway I run the script in any fw and one server becomes UNREACHABLE. I think the script does something wrong after all or maybe I have some missconfiguration in my asterisk conf files. The point is I am not so expert in iptables or shell scripting so I can't see anything in the iptables script. I have look for some issues like iptables blocking because of ip_conntrack table full, or "dont fragment" bit set in kernel problem, but nothing seems to be the right problem at all.
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Jan 27, 2010
I was just wondering if you know of any site/forum that is informative about Asterisk. I have just configured an Atcom IP04 in which Asterisk is embedded. I need to know how to configure the IP-PABX to receive fax and come up with a Skype Gateway to receive/call out on Skype.
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Nov 17, 2009
I am encountering a strange problem on my VOIP setup Basically, I have a asterisk appliance IP04. I have setup all the extensions and everything. I use a Linksys PAP2T as an ATA remotely. Now, my problem is the ATA sometimes is okay can call SIP and PSTN but sometimes I just can't hear anything. I thought it was my ISP blocking the VOIP packets but I have tried both the SIP softphone and IAX2 softphone on my PC. For IAX2, it works perfectly however in the SIP, I can hear the other end but they cannot hear me.
These are the ports I have opened on my router
1.) UDP 5060 - SIP Port
2.) UDP 10000 - 20000 - RTP Port
3.) UDP 4569 - IAX2
Do I need to open both TCP/UDP for these ports or UDP should be enough? These are the test cases:
1.) Using my WiFi Connection and a analog phone connected to ATA --> Sometimes working sometimes not and sometimes you can call SIP but the other end cannot hear you
2.) Using IAX2 in WiFi connection --> This one works perfectly
3.) Using a mobile phone connected to WiFi Network --> The same...but you can call and go out on PSTN but the other end cannot hear you
4.) Using a mobile phone connected via 3G --> Works perfectly but as expected it is quite slow and voice quality is awful
I want to use SIP rather than IAX2 because it is widely used and since my ATA doesn't support IAX2. Are there other ports I need to open or configure?
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Apr 24, 2010
I have installed 2 VoIP programs, skype and xten softphone (X-Lite), skype works well and no problem but on the xten softphone not so lucky, I get to hear the tone before dialing like any phone but can't receive calls and if I call, there's no sound, other side can hear me, but I can't hear a thing.
I need both, skype it's my personal account and xten softphone is for work.
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Jan 12, 2011
I am wondering if there is free VoIP software which will allow me to make and receive calls to regular phone numbers, such as landlines or cell phones, at no additional charge.
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Apr 20, 2011
Maybe I'm not using the right search terms, but I can't find anything on this. I have a setup of Slackware with Asterisk and FreePBX. I am recording calls on demand and can get to the recordings from the Call Monitor (web interface). I would like to be able to access the recording from the phone (Aastra 57i), much like a voice mail is accessed.
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Apr 14, 2010
I've bought a Conceptronics CPHONELU (C01-200) VoIP USB phone. I would like to take full advantage of my VoIP phone in Linux. Currently I'm using Sip Communicator as the softphone, but I tried x-lite 3.0 on Windows too. The phone works has like a regular headset, I can hear and speak without a problem. However I cannot take full advantage of the phone, since the phone keyboard only work in Skype through the Skype Portal software that come bundle with the phone (Windows only). Is there a driver that I can use in order to be possible to dial using the phone and display the called ID with a regular softphone?
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Dec 13, 2008
I would like to experiment with voip, is there any application which works successfully to make call from PC to phone, other than skype. If its beta also let me know, so that I can contribute my ideas to it. Any resource?
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Jul 20, 2011
I recently set up a Debian-based gateway+router on a remote site. I've installed OpenVPN and made a VPN bridge to another network (that server is also Debian). The main network has all the resources and also a VoIP server (asterisk). Bridge seems to work fine, except that every time a Linksys phone is used to call - after a few seconds I get:
Jul 20 12:16:05 sklad kernel: [403987.817695] eth0: link down
Jul 20 12:16:05 sklad kernel: [403987.817939] br0: port 1(eth0) entering disabled state
Jul 20 12:16:07 sklad kernel: [403990.113701] eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1
[Code]....
So whenever the phone is used, network falls down for a few seconds. And of course this breaks the call. There is also another Linksys box (analog-to-voip) and it works fine most of the time. However sometimes this "eth0 link down" happens too. There is nothing more in syslog to analyze, so I don't know where to dig. Physical device of eth0 is D-link DFE520.
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May 27, 2010
I am looking for a way to use my computer as a regular landline telephone not by VoIP but by actually dialing on my landline to talk. I don't know what software I need. My searches only bring up VoIP stuff leaving me stuck without answers. I am using a new installation of debian 5.0. I think that's all, if you need more details I can add them.
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Mar 18, 2010
Using 9.10 on dual boot P4. Try to use a USR 9602 voip phone plugged into USB port (this device works on WinXP)It does not show in Sound Preferences. I have tried on a different computer with U9.10 and same problem
[Code]...
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Feb 10, 2011
I`m using Fedora 14 and i`ve one problem, i use x-lite phone on windows and what is x-lite alternative for linux ? i`ve found x-lite phone for linux but it dont work fine . It has problems with sound card etc. What do you recommend?
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Sep 13, 2009
I compiled and installed the Asterisk ztdummy package because there is no rpm for it, unfortunately, and i even reinstalled asterisk, but i still get the "No application 'Meetme' for extension..." error when trying to conference. I do a "module show", and it lists other modules that were compiled with the zt source, but not ztdummy.Does anyone know how to fix this? This is more than a passing interest or hobby, because i need to conference about 3 to 5 people to help me test a new Website Content Management System and User Forums Management System i am about to launch as a service.
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Oct 7, 2010
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The goal is they stick the cd in and reboot. The system loads the super minimal linux then it runs a batch file that clones the portion of the CD that has the hard drive onto the system then it asks the nice moron....err....person...to remove the cd and reboot All I need is a a bootable system to a bash script that will run live from cd. I can make the nice bash script that puts to the screen a nice ascii graphic telling the lucky sap it's running and to come back in a little bit to make sure it's done.
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