17. Ring topology
The NMS (Network Management System) of Switching has implemented
Ring Topology so that if network is down from one side of an MSAG it will
re-route from the other side of Ring.
19. Workstations
There are 2 types of workstations:
Simple workstation
It is simple workstation used mostly. The interface is
computer system. It is used normally for checking statuses.
Emergency workstation
This workstation is used for authorized personnel only. It is
also called BAM, which stands for Back Administration
Module.
There are basically three different kind of switching vendors currently operational in PTCL network : Alcatel, ZTE, Huawei, Siemens (Discarded by ZTE), Ericson (Discarded by Huawei)
Indoor : Huawei & ZTE
Outdoor : Huawei, ZTE, Alcatel
All MSAGs are controlled by soft switches (software).
There are two different kind of transmission technologies currently operational in PTCL network : ZTE & Huawei`