Cabletron Systems DMS-100 - Manual (Page 177)

DMS-100 Family EIU User Guide TELECOM12
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Appendix H: ASU background
information
This appendix provides background information on application-specific units
(ASU) and the SuperNode platforms that support these ASUs.
Application-specific units and supported services
The following ASUs are described in this section:
• link interface unit (LIU7)
• Ethernet interface unit (EIU)
• frame relay interface unit (FRIU)
• X.25/X.75 link interface unit (XLIU)
• network interface unit (NIU)
• voice processing unit (VPU)
• application processor unit (APU)
Link interface unit
The link interface unit (LIU7) provides an interface for common channel
signaling 7 (CCS7). CCS7 supports a variety of services, including the
following:
• integrated user services part (ISUP) and connectionless (TCAP) -based
services
• enhanced 800 services (E800)
• automated calling card system (ACCS)
• custom local area signaling service (CLASS)
• advanced intelligent network (AIN) services
Ethernet interface unit
The Ethernet interface unit (EIU) supports Ethernet connectivity on the DMS-
100 switch. The operating company can configure the EIU as either an IP or