Firewall Wizards mailing list archives
Re: VOIP versus PBX
From: "Patrick M. Hausen" <hausen () punkt de>
Date: Thu, 21 Jul 2005 23:00:37 +0200 (CEST)
Hello, Wizards! Scott L. Stursa wrote:
I was also concerned that the VOIP system would mean every call - even desk-to-desk would go through the internetProbably true if the VOIP PBX is not on your premises.
[...]
So I don't feel I'm risking much, by stating in this public forum: Don't do it. Stick with a traditional (non-VOIP) PBX.
With the recent second hype about VoIP I'm always a bit puzzled why people imply that you have to get "VoIP service" if you want an IP based PBX. I'd take an IP based system any time, but: - rent a conventional phone service -> no problem with 911 - buy, not rent an IP based PBX and end systems (aka "Phones" ;-) - run VoIP on my strictly internal network I like VoIP, I agree with Marcus that it's loaden with probable security risks but if you know about them, you simply don't connect it to any public network. So, if you act like I would, what does VoIP buy you in the end? At least in Germany PBX systems are the most "locked in" pieces of IT that I've ever come across. Ridiculous licensing models, no documentation, vendors force you to rent their service for simple configuration tasks or charge ridiculous amounts for their propriatary configuration software. If you happen to actually buy instead of rent a PBX by a company that does provide documentation (like Ascom, Switzerland, for example) the configuration concepts of a PBX are rather weird to networking people (IMHO). We sell the products of a German company named Innovaphone. They produce fine (again, IMHO) IP based PBX systems - they are much more similar to the configuration philosophies we are acustomed to - routing based on longest prefix match, for example. You simply buy the stuff, it comes with full docs, you set it up. Period. No extra fees. Their IP based phones can fetch the central phone book from an LDAP server. The phone registers itself at the PBX with its MAC address. Unplug phone, go to next office, replug - you just moved including maintaining yor phone number ... I simply appreciate the similar concepts, the flexibilty in configuration an the fact that it's completely under my control. We've been using this stuff since 1998, so the vendor's been around at least for a while. We have Country and Western - we have a conventional PBX and the Innovaphone Equipment connected to it. If I'd buy completely new, I'd go completely Innovaphone. And in case of a power failure - our conventional PBX doesn't have an emergency power supply. I have a cellphone. And power failures in Germany are typically in the seconds range and occur _very_ rarely. I've had more downtime due to UPS's breaking than due to real power outages. Regards, Patrick -- punkt.de GmbH Internet - Dienstleistungen - Beratung Vorholzstr. 25 Tel. 0721 9109 -0 Fax: -100 76137 Karlsruhe http://punkt.de _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- VOIP versus PBX Yehuda Goldenberg (Jul 21)
- Message not available
- Re: VOIP versus PBX Marcus J. Ranum (Jul 21)
- Re: VOIP versus PBX Mark Teicher (Jul 21)
- Re: VOIP versus PBX Marcus J. Ranum (Jul 21)
- Message not available
- Re: VOIP versus PBX Scott Stursa (Jul 21)
- Re: VOIP versus PBX Patrick M. Hausen (Jul 21)
- <Possible follow-ups>
- FW: VOIP versus PBX Yehuda Goldenberg (Jul 21)
- Re: FW: VOIP versus PBX Paul D. Robertson (Jul 21)
- Re: FW: VOIP versus PBX Michael H (Jul 21)
- Re: FW: VOIP versus PBX Paul D. Robertson (Jul 21)
- Re: FW: VOIP versus PBX Michael H (Jul 21)
- Re: VOIP versus PBX Elizabeth Zwicky (Jul 21)
- Re: VOIP versus PBX Paul D. Robertson (Jul 21)
- Re: FW: VOIP versus PBX Paul D. Robertson (Jul 21)
- Re: FW: VOIP versus PBX Devdas Bhagat (Jul 22)