We are running an Intertel/Mitel PBX with a mix of Digital and IP phones. We also run ~50 Spectralink/Polycom 820.11x WiFi IP phones. I have both desk IP and wireless phones running over VPN's via DSL connections to a couple of our warehouses with all the other data from PC's etc and don't have call quality issues. You really shouldn't be concerned about BW. You should be more concerned about if you are going to do POE to the phones, VLAN's to separate voice and data, if the phones are 100MB or GB for pass-through to the computers, etc. I guarantee you will hate having to put power bricks at every phone. If the power goes out and they aren't on a local battery backup then what? Can't call 911, not to mention the extra cable clutter and users kicking the brick out of the plug under their desk. The only reason I'm not planning on going to all IP phones when our lease is up is because I can't justify upgrading all our switching to POE, otherwise I'd do it in a heartbeat.
________________________________ From: Tom Miller [mailto:[email protected]] Sent: Monday, May 02, 2011 8:39 AM To: NT System Admin Issues Subject: VOIP design questions Folks, We are planning to retire our current phone system and move to a Mitel VOIP system. Not having implemented VOIP before, I have some questions for those of you that have: - our vendor claims our current data network can easily handle VOIP traffic since it's a small amount of traffic (don't know exact amount yet, still awaiting vendor response). As such, they tell it is possible to use our current network to accommodate voice and data. I'm not sure if I"m comfortable with this. I was thinking of a more segregated approach: different network and voice and data never intersect. - our vendor claims we can use the existing data jack for the phones, and plug the desktop PCs/laptops into the phone as a sort of switch. I'm thinking this would add another level of complexity: phone is broke and by the way you can't get on the network now. - the reason the vendor suggests the above is that the current voice drops (cat5) terminate to phone patch panels (in most cases). Those cables would need to be cut and re-terminated to switches. So I have some concerns about our vendor claims. The dollar figure they propose does not include network changes, new switches, etc. Looking at the cost proposal, I am thinking there are quite a few hardware and man-hours costs missing. What do you folks do for VOIP? Thanks, Tom Confidentiality Notice: This e-mail message, including attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
