1.
INTRODUCTION
1.1
General
This document is valid as of Dragon PTN Release 3.0DR.
The 2-OLS interface module (=IFM) is an Optical Low Speed Serial interface module with four
ports: two Optical Serial ports (=port1, port2) and two E1 ports (=port3, port4). Each optical
port has two ST connectors: one Rx (=Receive) and one Tx (=Transmit) ST. Each E1 port is an
RJ-45 connector. This IFM will be used in point-to-point connection and:
converts the incoming serial signal on port1 into E1 on port3 and vice versa;
converts the incoming serial signal on port2 into E1 on port4 and vice versa;
This IFM can be used in any IFM slot of any node. An IFM slot overview can be found in Ref.
[3] in Table 1.
The E1 links provide synchronous TDM links between two end points that can be used to
transport over an external network e.g. SDH. The optical ports are the access ports whereas
the E1 ports are the SDH interconnection ports. At the destination side, the 2-OLS receives
the E1 traffic and converts it back to an optical low speed serial signal towards the end
application.
In HiProvision (=Dragon PTN Management), an 'Optical Low Speed Serial' service can be
configured between two optical ports, each port located in a different node. This service
bundles together 32 TDM (Time Division Multiplex) connections resulting in a total
bandwidth of 2.048 Mbps. The E1 side can slave its clock for example to the E1 clock from
the external network.
NOTE:
HiProvision can be configured redundantly.
Figure 1 2-OLS - SDH Example
HiProvision
Dragon
PTN Node
2-OLS
IFM
CSM
Optical Serial
Fiber Links
Dragon PTN MPLS-TP
Network
Optical Serial
Fiber Links
External Network
Example: SDH
Teleprotection1
External E1 Links
External E1 Links
Teleprotection2
'Optical Low Speed Serial' Service
CAUTION: This IFM is only a convertor module that needs to be powered via the
node. It will not have backplane or Dragon PTN network access. The MPLS-TP Drag-
on PTN network is not required (or optional) for this IFM to operate.
Interface Module PTN-2-OLS with E1/PTN-2-OLS with T
Release 01 02/2018
5
