Firewall Wizards mailing list archives
Re: FW: VOIP versus PBX
From: Roelof JT Jonkman <rjt () pobox com>
Date: Thu, 21 Jul 2005 13:31:17 -0700
Yehuda, This is a bit of an opinion piece, but never the less may give some insight: I'm a bit surprised that VOIP is getting so much traction. First thing is voice is point to point, ip is a connectionless protocol. (Not to mention that most of the underlying long haul infrastructure is really connection oriented voice based: sonet.) So the dichotomy is that we're stacking a connection oriented thing on top of a connection less protocol on top of connection oriented infrastructure. I would be one thing if you can completely share the infrastructure and get the reliability similar to conventional phone systems. However the general advocacy seems to be *not* to share infrastructure. (At the minimum VLAN's is advocated) So the 'cost savings' benefit is sort of out the window right there. The other thing is complexity. VOIP is more complex to administer than a PBX. The only point I can see to VOIP is if you are backhauling a lot of voice to a central location, and you have say more than a dozen offices or so. Administratively, and cost wise you may save there. (Less cost for conventional backhaul lines I'm guessing.) If I were you I would price out both options, and include reasonable guestimates of running costs for both. (And I would pad the running costs guestimate of VOIP royally do to the inherent complexity.) Depending on the size of your location (pbx) you may be subject to certain sets of legal obligations to provide proper phone system function in cases of emergencies. (power outage etc.) Even in my last office of 10 or so folks I made sure that the mini lucent pbx/voice box was on UPS etc. Also hardwired a regular POS analog phone to one of the incoming analog phone lines in the break room. Readily accessible in case of emergency. roel _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Re: VOIP versus PBX, (continued)
- Re: VOIP versus PBX Mark Teicher (Jul 21)
- Re: VOIP versus PBX Scott Stursa (Jul 21)
- Re: VOIP versus PBX Patrick M. Hausen (Jul 21)
- 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)