The T640 Core Router chassis is a rigid sheet metal structure that houses all the other router components (see Figure 1 and Figure 2). The chassis measures 37.45 in. (95.1 cm) high, 31 in. (78.7 cm) deep, and 17.43 in. (44.3 cm) wide. For physical specifications, see T640 Physical Specifications. The chassis can be installed into many types of racks or cabinets. For more information. see T640 Rack Requirements.
![]() | Caution: Before removing or installing components of a router, attach an ESD strap to an ESD point and place the other end of the strap around your bare wrist. Failure to use an ESD strap could result in damage to the router. |
![]() | Warning: The router must be connected to earth ground during normal operation. |
Figure 1: Front View of T640 Chassis

Figure 2: Rear View of T640 Chassis

For chassis serial number information , see Locating T640 Component Serial Numbers Using the CLI.