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) - ADTRAN Atlas 550 System Manual

ATLAS 550 System Manual Section 1 System Description

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 bps to
33.6 kbps 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 delivering 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 the 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 kbps 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 kbps to
2.048 Mbps in steps of 56 or 64 kbps. Either port can deliver timing for the system. Using the appropriate
adapter cables, the Dual USSI Option Module can provide the following interface types: EIA-530,
EIA-530A, RS-449, RS-232, and CCITT X.21.

Dual/Quad T1/PRI Option Module (P/N 1200314L1/L2 and 1200755L1/L2)

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 BRI U interfaces, each capable of operating in
either NT or LT mode. When operating in NT mode, any port 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 BRI S/T interfaces, each capable of operating in
LT mode.

Octal/Quad FXS Option Module (P/N 1200309L1/1200328L1)

The Octal/Quad FXS Option Modules provide eight or four analog voice-grade interfaces. Each interface
provides talk battery, off-hook supervision, E&M signaling conversion, and ringing in loop-start or
ground-start operation. Call progress tones, where necessary, are provided to the modules by the
ATLAS 550 base unit.
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