In the prior installment of this series, we discussed the potential cost and logistics of adding fiberoptic capacity between all the Telecommunication Rooms and the Equipment Room as part of improving cellular signal indoors. This post covers the infrastructure needs of rack space, power and HVAC in the building’s Equipment Room. FYI, if you are new to this series and want to get the most out of it, please start here, and read the posts in sequence.
The Equipment Room houses the common equipment that drives the systems installed in each of the Telecommunication Rooms in the building. An Equipment Room can either be standalone, or an identified space in an enterprise data center.
Equipment Room Design Elements:
- All fiberoptic and, possibly, copper network connections terminate here.
- Space for necessary racks of enterprise and carrier equipment.
- Network termination equipment for telecommunication circuits external to the building fed from the building’s Entrance Room.
- HVAC capacity to maintain correct operating temperature and humidity for the critical equipment that is housed in the room.
- Power capacity (AC/DC) necessary for the critical equipment that is housed in the room. This can be on UPS and/or Backup Generator.
For reference: Equipment Room, cable pathways and other structural design elements are well documented in the EIA/TIA-569B specification.
Space required in Equipment Room for In-building Cellular
We recently talked to a company that designed a Distributed Antenna System (DAS) for a large 485,000 sq. ft. hospital. According to this company, the DAS system required eight 19” wide, and 72” tall racks of equipment in Equipment room.
- 8 Racks, occupying more almost 40 sq. ft. of space
- (4) 72” high, 19” wide, racks for the DAS headend
- (4) 72” high, 19” wide, racks for the BTS equipment (two bands of LTE, with three sectors of capacity per band)
- Two 100A circuits from two different power distribution sources
If you have so much space to commit to in-building cellular, you are either lucky, or have tremendous foresight! When the same hospital, looked at SpiderCloud E-RAN, they were surprised to find how little space was required for SpiderCloud:
- 1U (1U = 1.75” of height) of space inside a 19” rack, for the Services Node
- Two 15A circuits from two different Power Distribution sources
- No additional cooling (since the Services Node uses less than 150W of power!)
All commercial floor space has a price, but space in your Equipment Room… that is priceless! The Equipment Room is where all your network connections, from inside the building and outside are coming in. Do you really want to fill it up with racks of equipment to offer a few sectors of LTE capacity to building occupants, when all you really need is 1RU of space to run a network that can deliver ten times as much capacity?
To recap, E-RAN is “enterprise IT friendly” by using:
- Using 1U of rackspace Equipment Room
- Dissipates less than 150W of heat
- Two 15A 110VAC circuits
In the next installment, we will summarize the end-to-end benefits of E-RAN to satisfy the voracious needs of today’s mobile employees in the enterprise.
– Art King, SpiderCloud Wireless, Director of Enterprise Services & Technologies
Other posts from the Enterprise Deployment Series:
- Enterprise Deployment – Setting the Stage
- Enterprise Deployment – Ethernet and the Physical Layer
- Enterprise Deployment – Telecommunications Room
- Enterprise Deployment – Telecommunications Room Interconnection
- Enterprise Deployment – Equipment Room
- Enterprise Deployment – Backhaul
- Enterprise Deployment – Summary