Contract # GS00T01AHD0002 

Proposal to Add Federal Telecommunications Service   Long Distance (FTS LD) 

Chiller plants and multiple CRAC units provide air conditioning. The CRAC units 

are strategically located to deliver lower temperature conditioned air to maintain a 

room temperature of 72 F.  

6.7.19.5 Internet 

Data 

Center Network Infrastructure 

AT&T has designed and built reliability into the network infrastructure of each of the 

Internet Data Centers through the use of proven network components, backup or 

failover hardware, and configurations engineered to provide no single point of failure. 

Each Internet Data Center utilizes two or more Cisco 7513 or Cisco 12000 Gbps 

routers to transmit and receive data over high speed connections that leave the facility 

through separate exits and travel physically diverse paths to multiple backbone nodes.  

AT&T provisions and maintains all network connections from the Internet Data 

Centers to the AT&T Global IP Network.  

6.8  Broadband Business Services 

6.8.1  AT&T Digital Subscriber Line (DSL) 

DSL is a broadband access technology that allows transmission at bandwidths from 

144 Kbps to 1.5 Mbps. DSL offers high bandwidth at lower prices than other types of 

Private Line access. DSL Technology is available in several varieties. AT&T DSL 

Internet Service utilizes Symmetric Digital Subscriber Line (SDSL), ADSL and 

ISDN Digital Subscriber Line (ISDL) access technologies (described below). The 

type of DSL access utilized will depend upon the access speed and the distance the 

user is from the central office. The maximum speed possible on a circuit varies 

inversely with the length of the local access. The longer the access, the smaller the 

data speed. The suite of DSL services that are available from AT&T include: 

Use or disclosure of data contained on this sheet is subject to the restriction on the title page of this proposal. 

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