ATLAS 550 System Manual Section 1, System Description
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E1/PRA Network Interface Module (P/N 1200308L1)
The E1/PRA Network Interface Module provides one channelized E1 or PRA interface using either a
standard DB-15 or BNC connector. This interface operates in CCS or CAS signaling mode and can deliver
timing for the system. The ATLAS 550 international system (P/N 1200306L1) ships with one installed
E1/PRA Network Interface Module.
Modem Management Network Module (P/N 1200341L1)
The Modem Management Network Module provides a single analog interface (RJ-11) for dial-up remote
management of the ATLAS 550 System. The internal modem supports connection rates from 2400 to
33.6 K and performs standard data modulation, error correction, and data compression.
BRI DBU Network Interface Module (P/N 1200327L1)
The BRI DBU Network Interface Module provides a single Basic Rate ISDN (BRI) U interface, capable of
operating in either NT or LT mode and can deliver timing for the system. The BRI DBU Network Interface
Module supports two independent calls or one BONDed call. All BONDing functionality is provided on
the module so a BONDing resource module (1200326L1) is not required.
Dual Nx 56/64 Option Module (P/N 1200311L1)
The Dual Nx 56/64 Module provides two synchronous V.35 DTE ports that can operate from 56 K to
2.048 Mbps in steps of 56 or 64 kbps. Either port can deliver timing for the system.
Dual USSI Option Module (P/N 1200754L1)
The Dual USSI Option Module provides two synchronous DTE ports that can operate from 56 K to
2.048 Mbps in steps of 56 or 64 kbps. Either port can deliver timing for the system. The Dual USSI Option
Module can provide the following interfaces using the appropriate adapter cables: EIA-530, EIA-530A,
RS-449, RS-232, and CCITT X.21.
Dual/Quad T1/PRI Option Module (P/N 1200314L1/1200755L1)
The Dual/Quad T1/PRI Module provides two or four channelized T1 or PRI interfaces. Each interface can
operate independently in DS-1 or DSX-1 mode, and any port can deliver timing for the system.
Quad Basic Rate ISDN (U-Interface) Option Module (P/N1200315L1)
The Quad Basic Rate ISDN (U) Module provides four Basic Rate ISDN (BRI) U interfaces, each capable
of operating in either NT or LT mode. Any port (operating in NT mode) can deliver timing for the system.
Quad Basic Rate ISDN (S/T-Interface) Option Module (P/N 1200764L1)
The Quad Basic Rate ISDN (S/T) Module provides four Basic Rate ISDN (BRI) S/T interfaces, each
capable of operating in either NT (future) or LT mode. Any port (operating in NT (future) mode) can
deliver timing for the system.
