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Overview of ColoServe's San Francisco Data Center

ColoServe's data center was built by WorldCom in 2000. The building also houses “super-nodes” for MCI and AT&T local phone service in San Francisco, so it is considered an “essential” facility because 911 calls are routed here. We share generators, power, cooling, and fire suppression infrastructure with MCI (formerly Worldcom), including dual 2 Megawatt generators that support the critical power requirements and operations of the building.

  • Built by Worldcom in 2000 as expansion space
  • ColoServe reopened it in September 2003
  • 20,000 square feet of capacity
  • Plenty of available power and cooling

Network Operations Center

ColoServe's Network Operations Center (NOC) is built right in the center of our data center floor, and is staffed 24/7/365 by certified systems administrators and network engineers. The 21 screens that make up our NOC monitor everything from network traffic and performance to power, temperature and security systems to services, applications, known vulnerabilities and RAID array status on customer servers.

  • Large on-site NOC with 24/7 Engineers
  • Real-time monitoring and alerts for all critical systems
  • Customer level service and application monitoring

Building Construction

Our data center is located in the San Francisco Telecom Center, conveniently located just south of San Francisco’s Financial District. This 100% occupied telecom building also houses AT&T and MCI super nodes. The building was originally built in 1924 as a Marine Corps Depot for heavy equipment, so the five story structure is built of extra-thick, reinforced cast-in-place concrete. The building was seismically retrofitted in 1999 to convert the existing warehouse into a Telecom Center in accordance with San Francisco’s Uniform Building Code, and then retrofitted a second time to exceed those standards by tenants AT&T and MCI in accordance with their stringent telecom carrier standards.

  • Secure building originally used for storage of military tanks and equipment
  • Built on an outrcopping of solid bedrock that also supports a tower of the Bay Bridge
  • Seismically retrofit in 1999 to meet rigorous City of San Francisco building codes, then retrofit extensively by MCI again
  • Six separate fiber entrances with 2 fiber rooms. A large portion of the Bay Bridge Fiber Consortium terminates in the building (cross-bay Fiber)
  • State-of-the-art redundant systems for power, HVAC, fiber connectivity, seismic precautions and fire suppression

Fire Suppression

Our state-of-the-art fire suppression has three levels of protection. Halon fire extinguishers are located throughout the data center. We also have a two stage TotalPac double interlocked dry-pipe preaction system, with tightly defined zones to isolate and extinguish any fires without affecting surrounding areas. This system must detect both smoke and heat to be triggered. The data center is protected by a grid of 200 sensors on the ceiling and 200 under the raised floor plus "VESDA" AnaLaser-brand laser smoke sensors that are 10,000 times more sensitive than conventional smoke detectors and capable of detecting incipient smoldering. The system is monitored 24 x 7 on-site and off-site by both ColoServe and MCI NOCs. 

  • Halon Fire Extinguishers
  • VESDA laser smoke detection with dry pipe suppression
  • Tightly defined preaction zones for localized fire extinguishing
  • Monitored and maintained by both ColoServe and MCI


The San Francisco Telecom Center where our data center is located maintains the highest possible standards for physical security. This facility is home to only three tenants, MCI, AT&T and ColoServe, and is equipped with state-of-the-art video and audio monitoring equipment and 24 x 7 on-site guards. All people entering the building are required to register with the security office and leave a valid ID while in the building. Those not on the access list are not allowed into the building without an escort. We check in visitors a second time prior to entry into our data center on the second floor. The ColoServe NOC is staffed 24 x 365 and is afforded a direct line-of-site view into the data center.

  • 24 x 7 security guards at front entrance
  • Secondary check-in at our second floor data center
  • 24 x 7 systems administrators / NOC on the data center floor


ColoServe has tremendous cooling infrastructure, with dual redundant chilled water supply loops and multiple Liebert air conditioning units pumping cold air into the pressurized raised floor of our data center. Chilled water is provided by the roof cooling towers, which also provide chilled water for MCI’s critical systems. Additional chilled water supply and return valves are already plumbed every thirty feet along the perimeter of our data center, allowing for rapid installation of additional Liebert units should increased cooling capacity be required.

  • n+1 Liebert VACs w/n+1 supply loops and chillers
  • Up to 300 tons of cooling capacity that runs on MCI’s chilled water systems
  • Raised floor system for efficient distribution of cooling

Power Infrastructure

Our data center power is fed by conditioned UPS (uninterruptible power supply) electricity, with redundant feeds from dual 2 Megawatt generators that also support critical MCI phone switches. One generator can power the entire building for several days time, and there is 20,000 gallons of reserve diesel fuel on site. These generators are tested monthly per stringent MCI protocols, and every third month the power is disconnected from the two utility feeds to ensure proper generator operation.

  • Redundant power feeds with UPS power
  • 2 x 2 megawatt generators that also power MCI’s local phone switches
  • 20,000 gallons of diesel fuel on site, hot-refill ready

Fiber and Bandwidth Providers

ColoServe operates its own screaming-fast network™, featuring multi-homed bandwidth with connections to over 40 networks. We route traffic over major Tier 1 Internet backbones such as UUNet, Level 3, NTT/Verio, AboveNet and PAIX, with no low-quality bandwidth and plenty of network capacity for maximum reliability and scalability.

  • Six separate building fiber entrances with 2 fiber rooms. The Bay Bridge Fiber Consortium terminates in the building (cross-bay Fiber).
  • ColoServe has 2 separate fiber entrances on different streets (both Spear and Harrison) for an additional layer of redundancy
  • Current Transit routed by ColoServe:
    • MCI Gig-E and OC-12
    • IP Networks Gig-E (NTT/Verio)
    • 2 x AboveNet Gig-E
    • Yipes Gig-E (Level 3)
    • Peering with over 40+ networks at PAIX