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Major benefits of the AOSS include Directory Assistance is provided with a
modern environment, AOSS position administrative activities are performed by
the DMS-200 toll maintenance system, trunking savings are achieved by
combining trunking for 1+ and 0+, and Directory Assistance traffic, DA
services are managed by using TOPS methods, Creation of a built-in training
system, which does not require additional training equipment and reduces
training costs.
Integrated Business Network
The Integrated Business Network (IBN) is a revenue-producing concept
designed for small and big businesses to offer modernized PBX and Centrex
features. The Operating Company can use the IBN to maintain and enhance its
competitive position on a operational DMS-100 and DMS 100/200 switches.
While using the DMS-100 switch, the Operating Company can support varying
business features along with existing local/toll traffic.
IBN services can be introduced to a Centrex-Central Office (CO) or a
Centrex-Customer Unit (CCU) by additional software modules and minor hardware
enhancements.
Current IBN features include: A growing system that can handle 30,000
lines, networking capabilities, city wide service for DMS- 100 switch and
remotes for any one customer station Message Detail Recording (SMDR), which
gives IBN customers call records. The records can be used for system analysis
and control and station charge-back. SMDR can use LAMA records, if the IBN
host has LAMA equipment, Centralized attendant maintenance and administration
functions and Direct Inward Dialing (DID).
Electronic Switched Network (ESN)
The Electronic Switched Network is designed to meet the telecommunication
needs of large multi-location corporations. The ESN is made up of a SL-1 or
SL-100 Digital Business Communications System with networking features or a
DMS-100 IBN host. The SL-1 can handle from 30-5000 lines. The SL-100 and the
DMS-100 IBN hosts can hold from a few thousands to 30,000 lines.
A DMS-100 IBN or SL-100 can remotely serve many locations from the host
site. This is done by a connection through digital transmission facilities
which are set up at remote modules at the subscriber's premises.
Specialized Common Carrier Service (SCCS)
The DMS-250 Specialized Common Carrier Service (SCCS) provides the
capability of Analog to Digital (A/D) and Digital to Analog (A/D) conversions
which are necessary with analog circuits. The DMS-250 can also switch voice
and data circuits.
The DMS-250 takes either analog or digitally encoded info and by using time
slot interchange, switches it from any input port to a temporary addressed and
connected exit port. The info may or may not be converted back to analog.
Normal Private Telecommunications Network Diagram:
----- ------
[Phone]--| SnS | | SL-1 |-[Phone]
| PBX | | PBX |
----- ------
| |DOD/DID DOD/DID| |
| ------- ------- |
|Tie | | Tie|
|Trunk --------- Trunk|
------| Class-5 |------
----| Centrex |----
| --------- |
| |
| |
| |
----- Tie Trunk ---------
| SnS | ----------| Class-5 |
| PBX | | Centrex |
----- ---------
| |
| |
| |
| |
------- ------
[Phone]-| Small | | SL-1 |-[Phone]
| PBX | | |
------- ------
Cellular Mobile Radio Service
A cellular system consists of two main parts a cellular switch and cell
site equipment.
Cellular Switching Systems
A cellular switch performs three main functions audio switching, cell site
control, and system administration.
The DMS switches provide three basic implementations for cellular switching
Stand-alone, Combined, and Remote.
Stand-alone switching is done by a Mobile Telephone Exchange (MTX) which is
interfaced with one or more class 5 end offices. The connection is made by
DID/DOD trunks. Depending on the needs of the area, the MTX can be divided as
follows: MTX which serves urban areas, MTXC which handles suburban areas, and