WAN Subsystem Configuration and Management Manual

Overview of the WAN Subsystem
WAN Subsystem Configuration and Management Manual—522463-011
2-18
Architecture and Components of the SWAN 2
Concentrator (T3881)
Architecture and Components of the SWAN 2
Concentrator (T3881)
The SWAN 2 concentrator is a communications device that connects bit-synchronous,
byte-synchronous, and asynchronous devices to Integrity NonStop NS-series or
NonStop S-series servers. The SWAN 2 concentrator enables customers migrating
from NonStop K-series servers to Integrity NonStop NS-series or NonStop S-series
servers to preserve their investment in legacy devices.
The SWAN 2 concentrator is based on a faster processor. Some of the SWAN 2
concentrator’s features are:
•
Modularity
•
Redundant power
•
Single-line fault zone
•
Increased throughput and availability
•
Online-replaceable hardware components known as customer-replaceable units
(CRUs)
The SWAN 2 concentrator connects to the Integrity NonStop NS-series or
NonStop S-series server through dual 10/100 Base-T Ethernet connections, which
provide fault tolerance if an Ethernet link or controller fails.
Supported Electrical and Physical Interfaces
Each SWAN 2 concentrator contains six communications line interface processors
(CLIPs). Each CLIP has an associated WAN backplane interface card (BIC). Together
they support two WAN serial ports, resulting in 12 lines that can support any
combination of the following electrical and physical interfaces:
•
RS-232
•
RS-449
•
V.35
•
X.21
Because each SWAN 2 line supports asynchronous, byte-synchronous, or
bit-synchronous transmissions independent of other lines, a single SWAN 2
concentrator performs the functions of multiple controllers.
Note. For more information about the SWAN concentrator (T3880), see Architecture and
Components of the SWAN Concentrator (T3880) on page 2-7.
Note. The communications line interface processor (CLIP) is also known as a WAN logic
board (LB).
Note. The configuration rules allow any I/O protocol to share a CLIP with any other I/O
protocol. All combinations are fully supported.