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C H A P T E R
2 :
S E T U P
2 Setup of the Cable Connections
The E1/T1 Option for the OPERA™ voice quality analyzer enables you to
perform measurements with digital PSTN systems like Primary Rate Access
(PRA) to ISDN, E1 CAS/MFR2 protocols or T1 CAS/Robbed Bit protocols.
To connect the OPERA™ system to your system under test, two RJ-48
connectors are provided as shown in Figure 2.1. These trunks are labelled
"1" and "2" on the back plate of the E1/T1 interface board. The Indicator
LEDs shown above of the RJ-48 connectors are dual-colour LEDs that
indicate the status of trunk 1 and 2, left to right. The LEDs are lit green for
normal operation. If an LED is lit red either a loss of signal (LOS) or a loss of
frame alignment (LFA) has been detected.
Ethernet RJ-45
2 Trunks RJ-48
Figure 2.1: Rear View of the E1/T1 Interface Board.
Note:
The RJ-45 connector labelled "ETH" and the two Ethernet
LEDs are not supported in the current version of OPERA™.
In future versions, the Ethernet trunk will provide a
connection to your IP network, thus giving the option of
assessing voice quality in VoIP systems.
In Figure 2.2 the connector pins for RJ-48 are shown.
O F
T H E
C A B L E
C O N N E C T I O N S
Ethernet LEDs
Indicator LEDs
3
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