Section 1 System Description ATLAS 550 System Manual20 © 2004 ADTRAN, Inc. 61200305L2-1B3. OPTION MODULESEach of the following ATLAS 550 option modules is hot-swappable:• T1/PRI Network Interface Module (P/N 1200307L1/L2)• E1/PRA Network Interface Module (P/N 1200308L1)• Modem Management Network Module (P/N 1200341L1)• BRI DBU Network Interface Module (P/N 1200327L1)• Dual Nx 56/64 Option Module (P/N 1200311L1)• Dual USSI Option Module (P/N 1200754L1)• Dual/Quad T1/PRI Option Module (P/N 1200314L1/L2 and 1200755L1/L2)• Quad Basic Rate ISDN (U-Interface) Option Module (P/N1200315L1)• Quad Basic Rate ISDN (S/T-Interface) Option Module (P/N1200764L1)• Octal/Quad FXS Option Module (P/N 1200309L1/1200328L1)• Octal/Quad FXO Option Module (P/N 1200310L1/1200329L1)• Octal E&M Option Module (P/N 1200313L1)• Octal Ethernet Switch Option Module (P/N 1200766L1)• Resource Host Module (P/N 1200324L1)• 4, 8, 16, 24 Channel Voice Compression Resource Modules (P/N 1200312Lx)• 32 Channel ADPCM Resource Module (P/N 1200752L1)• Nx 56/64 BONDing Resource Module (P/N 1200326L1)• Legacy Data Option Module (P/N 1200342L1)• NxT1 HSSI/V.35 Option Module (P/N 1200346L2)Each option module contains a variety of performance and alarm status information. Although defaultvalues reflect the most common configurations, several features of each module are user-configurable. Alloption modules contain an extensive self-test as well as tests designed for the technology they incorporate.T1/PRI Network Interface Module (P/N 1200307L1/L2)The T1/PRI Network Interface Module provides one channelized T1 or PRI interface. This interfaceoperates in DS-1 or DSX-1 mode and can deliver timing for the system. The ATLAS 550 domestic system(P/N 1200305L2) ships with one installed T1/PRI Network Interface Module.E1/PRA Network Interface Module (P/N 1200308L1)The E1/PRA Network Interface Module provides one channelized E1 or PRA interface using either astandard DB-15 or BNC connector. This interface operates in CCS or CAS signaling mode and can delivertiming for the system. The ATLAS 550 international system (P/N 1200306L2) ships with one installedE1/PRA Network Interface Module.Replacing an option module with a different module type will result in configuration loss.
