Next Big Thing is Here – SIP trunks for Voice!

Having been in the Telecom field for well over twenty years, we were always saddled with certain decisions when it came to trunks to PSTN (Public Switch Telephone Network).  If you could live with marginal voice quality or didn’t have the budget to pop for a T-1 voice circuit, you had few options.  Your choices were between using POTS lines, CO (Central Office) trunks, or tie trunks if multi-location. These were typically analog with a snap, crackle, pop reminiscent of Rice Krispies1

The other choice was a voice T-1 or PRI flavor, both of which we were more expensive, but as it was digital, it was crystal clear and the bonus was it only used four wires for 24 phone lines or 23 for PRI (ISDN Primary Rate Interface). Heck, even I paid for PRI though I did not have a need for all the lines as I could not accept sacrificing call quality.

Fast-forward to today and Session Initiation Protocol, aka SIP. There are a lot of cool things about it, but it’s important to understand its current form of implementation.  It can also be implemented in a couple different manners. It can be delivered by your carrier over Ethernet, but don’t think that it will conflict and turn into a VoIP chattering, as it comes in on its own circuit. Alternately, as it is a protocol, it can also be delivered over existing MPLS circuits for multi-location businesses as long as QoS is enabled.  Important to note is that the SIP connection provided by your carrier is from your phone system/PBX to the carrier. The calls to the outside world are still carried through PSTN so the quality will remain acceptable.Print

What is so cool about SIP? First off, it handles both voice and video. But here is the really neat thing, much like a SuperTrunk of days gone by or the PRI of today, if you need less that 20-some lines, but want the robust DID (Direct Inward Dial) functionality, SIP trunks are for you.  Here’s a real scenario. I pay $250 per month for a PRI, but I can get 5 each SIP trunks (at $12 each for 3-year commitment) for $60 a month!  This will save me $190 per month and that’s a good thing – a real good thing!

SIP trunks may not be for everyone and may not even be available in your area, but if considering a new phone system or a new carrier, you should at least consider SIP trunks. If you’re simply changing telecom carrier and want to entertain SIP trunks, you will need to check to see if your phone system is SIP-trunk ready and capable.  Those pesky details!

If you want to know more or if you area or phone system is SIP-trunk ready, feel free to give us a call. We’re here to help!

EdSignature

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The True Power of Power over Ethernet (PoE)

FACT: Today, PoE ports represent one quarter of all enterprise Ethernet ports. As with any evolving technology, its true worth to business must be weighed as it ultimately determines its long term success. Not being a spring chicken myself, this is not unlike the days of Frame Relay. Though it was slow to be adopted, it became a big hit until newer technology offerings became available- like MPLS (Multi Protocol Label Switching). I digress.

PoE is very much the same thing, but with much farther reaching potential. In a nutshell, PoE is where low voltage DC power is pushed over a CAT5E or better Ethernet cable. As many of you know, pins 1, 2, 3, & 6 are used for Ethernet data transmission. Pins 4 & 5 are blank so as to not conflict with someone plugging in a legacy phone line RJ11 plug into an RJ45 jack and blowing up an expensive network switch. Power of PoE goes over pins 7 & 8, aka THE BROWN PAIR .This prevents you from having to run electrical outlets to every device, as the power comes over the Ethernet cable. The costs savings here can be quite substantial.

Understanding the standards and options is key here as you may already have some PoE switches, but they may be older. It is important to know their capability before buying equipment. Older switches simply cannot power the newer and higher demand PoE devices due to their lower wattage restriction.

802.3af is the original 2003 standard that supplies up to 15. Watts of DC power, though only about 12.5 watts is assured.

802.3at aka PoE+ is the current standard and takes it up to 30W (25 adjusted for power loss). With the greater power, many more applications are possible!

As with any Ethernet cable run, the standard 300 foot distance limitation applies here as well.

PoE Devices. Although the most common uses for PoE today are for IP phones and wireless access points, this this is a rapidly expanding field. There is significant growth in the areas of surveillance, which includes encompassing video up to HD standards and building access control. Rounding off some of the current PoE device offerings includes digital signage, IP paging, school clock systems, video phones and many others. New devices will emerge being able to utilize PoE power thus creating a more powerful and useful network. Simply put, this is where were headed. So, when looking to move and re-cable, you may want to rethink where to add cable drops as to ensure you don’t fall short and have to end up paying for expensive  piecemeal cabling to fill your needs.

PoE switches. A number of outfits make these switches, including the likes of Juniper, HP, Cisco and many others. Our favorite switch is Juniper’s EX3300 series for a number of reasons. First, the price point is attractive. Second, it has “virtual chassis technology”. What this means is that the virtual switch (made up of many physical switches) only uses one IP address and all switches within the virtual switch can be viewed in a single interface, greatly simplifying management. Another benefit here is that individually, these are all 1U (1.75”) units that will make it simple to swap out old switches and put in new switches without having to re-manage patch cables. Finally, we love the DAC cable because for $100, it gives you a sweet 10Gb interface to other switches that are close and to servers that adhere to the SFP DAC standard so you don’t have to use fiber to get 10Gb within the same room. It’s a win-win as the DAC cable saves cost and is less fragile than fiber.

In summary, if you’re changing out your data switches, consider popping for a few extra dollars to go for PoE to future-proof your dollars and being to save even more downstream.