Overview Of The Eiu - Nortel DMS-100 User Manual

22 Chapter 1: Introduction to the EIU
•
•
•
•
•

Overview of the EIU

The EIU is an application-specific unit (ASU) that supports Ethernet
connectivity on the DMS-100 switch. You can configure the EIU as either an
IP router or an OSI router. The EIU also supports host services.
The EIU is intended primarily as a high-speed interface that provides
connectivity in a co-located environment such as that in a Central Office.
However, if the EIU is deployed in a LAN extending beyond the co-located
environment, you should observe the limitations and network security notes in
the caution above.
The following list summarizes the router and host services that use dedicated
EIUs. For general information on ASUs, refer to "Appendix G: ASU
background information".
•
•
•
297-8991-910 Standard 03.01 August 1999
EIU provisioning requirements
billing
service orders
user interface characteristics
logs, alarms, and operational measurements (OM)
Note: The following applications may not be available in all product lines
or markets. For more information, consult with the specific Product Line
Manager or contact Nortel Networks.
Automated directory assistance service (ADAS). ADAS provides
assistance to an operator by automatically prompting subscribers for
directory assistance information. ADAS uses the EIU to support
messaging between an ADAS OA&M position and the DMS-100 switch.
Billing server. Billing server allows the DMS-100 switch to forward
billing and OM information from a DMS file processor (FP) to an external
operating company billing processor. The OM data is sent to the
downstream processor through a different EIU. The system throttles the
billing server traffic at 36 kbyte/sec. Note that this application is only
supported on DMS-250 or combinations with DMS-250 and GSM product
lines.
Automatic file transfer (AFT). The AFT application lets the operating
company use TCP/IP to transport billing and operational measurement
(OM) data from the DMS-250 IOC (input/output controller) disks to the
downstream processor over an Ethernet LAN. One EIU can support both
billing and OMs. For this application, the recommended number of EIUs
is two: one EIU is dedicated to billing data and the other is to OMs.
AFT is also referred to as Madley AFT. Limited availability.