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Port Interface Modules 4-5
PIMs and BRIMs
APIMs
The Asynchronous Transfer Mode (ATM) Port Interface Modules, or APIMs, are
designed to allow connection to differing ATM networks, supporting not only
different media, but different speeds of ATM transmission. When selecting an
APIM, the Network Designer must ensure that the APIM supports both the
required media and the technology to be used. The media and technologies
supported by the available APIMs are listed below:
APIM-11: Multimode Fiber Optic TAXI connection
APIM-21: Multimode Fiber Optic OC3c connection
APIM-22: Single Mode Fiber Optic OC3c connection
APIM-29: Unshielded Twisted Pair STS3c connection
APIM-67: Thin Coaxial Cable DS3 connection
WPIMs
Wide Area Network Port Interface Modules, or WPIMs, act in much the same
manner as APIMs. Each WPIM is designed to provide connections to a particular
type of Wide Area Networking technology.
WPIM-SY: Synchronous link
WPIM-T1: T1 or Fractional T1 link
WPIM-E1: E1 or Fractional E1 link
WPIM-DDS: 56K link
WPIM-DI: Drop-and-Insert WAN link