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Samsung DCS Application Note No 15 - Issue 01 Page 2 of 8
For Further Information Call LSP Communications
Connecting two systems using E&M Tielines can be done using three methods:
• Directly - if both systems are co-located
TX pair of system A is connected to the RX pair of system B
RX pair of system A is connected to the TX pair of system B
E lead of System A is connected to the M lead of system M
M lead of system A is connected to the E lead of system B
As per Figure 1 on Page 1
• Using Telstra Voicelink T - if network cable is required for connection
Cable the RX, TX, E lead and M lead to the MDF and tag them accordingly. Telstra then connect the
circuits to their Voicelink T circuits. Telstra connect the six wires to an interface that converts the
six wire circuit to two pairs using a cailho circuit and at the other end the two pair circuit is
converted to a six wire circuit for connection to System B
• Using Frame relay or some other form of multiplexing that supports E&M Tieline interfaces
Connection using Frame Relay or similar should be done in consultation with the multiplexer
installer/supplier. The cabling will involve using six wires.
Care should be taken to identify the leads as it is easy to become confused whether a pair tagged RX
on the multiplexer should be connected to the RX pair or the TX pair of the DCS or DCS 70. Similar
care should be taken when connecting the E lead and the M lead. Although it is unlikely damage
could be caused by incorrect connections, the E&M Tieline will only work if connected correctly.
Installation
• E&M Tieline cards must be installed in DCS systems with Version 5 or later software and the DCS
70
• E&M Tieline cards may be installed in any universal slot in any DCS cabinet
• E&M Tieline cards may be installed in any universal slot in the DCS 70
• The method used to install E&M Tieline cards is the same as installing other cards, the system
must powered off before installing or removing the cards
• If an E&M Tieline card is being added to an existing system, the procedures used are the same as
adding any other card.
+ Power Off
+ Insert the card in a vacant slot
+ Power On
+ Pre-install using MMC 806 after selecting the appropriate cabinet and slot then press right
hand soft key
+ Program the dial numbers in MMC 724
Tails and Connections
1. DCS 70