ATLAS 550 System Manual Section 1, System Description
61200305L1-1F © 2002 ADTRAN, Inc. 17
ISDN Switch Types
• 5ESS™, DMS-100™, National ISDN, 4ESS™, EuroISDN
Dedicated Connection Maps
• Up to five connection maps
• Time of day/day of week configurable
• Preserves signaling through cross-connect
• No effect on non-configured channels
Switched Connection Maps
• Inbound and outbound call filtering and blocking
Testing
• Local and remote: payload/line, V.54 (depending on installed modules)
• Patterns: 511, QRSS, all ones, all zeros (depending on installed modules)
Performance Monitoring
• Reports: Information stored for last 24 hours in 15 minute increments
• Performance statistics per TR54016, T1.403, RFC1406
• Alarm reporting per TR54016, T1.403
Frame Relay
• Routes Internet Protocol (IP) traffic between a public frame relay network, a private frame relay net-
work, or a point-to-point (PPP) network and the Ethernet port.
• Concentrates IP traffic from a public or private frame relay network to one or more serial ports (V.35).
The protocol passed over the serial port is frame relay (RFC 1490 encapsulation).
• Passes Systems Network Architecture (SNA), Bisync, and other legacy protocols between a public or
private frame relay network and an external DTE running frame relay to ATLAS.
• Performs voice compression/decompression (G.723.1) and interfaces to either a Private Branch Ex-
change (PBX) or the Public Switched Telephone Network (PSTN). (This feature requires an additional
option module, the VCOM Module—P/N 1200312Lx.)
• Performs voice packetization (G.711 or Transparent) or voice compression/decompression (G.726) and
interfaces to either a Private Branch Exchange (PBX) or the PSTN. (This feature requires an additional
option module, the 32 Channel ADPCM Resource Module - P/N 1200752L1.)
• Supports LMI, Annex D, or Annex A signaling on frame relay connections.
PPP Switching
• Supports up to 100 simultaneous PPP connections.
• Performs PAP, CHAP, or EAP authentication methods on a per connection basis.
• Includes keepalive functionality for PPP connections.
• Provides capability for numbered or unnumbered PPP interfaces.