CTC Union TRM01, Руководство пользователя

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Chapter 1. Introduction
2
TRM-01 APR 2000
The TRM-01 and FT1 Cards fully meet all T1 specifications including
ITU-T G.703, G.704, G.706, G.732, and G.823.
Each FT1 Card features V.54 diagnostic capabilities for performing local
loop back and remote loop back. The operator at either end of the T1 line may
test both the
FT1 Card and the line in the digital loop back mode. The loop
back is controlled by either a manual push-button switch or by the DTE
interface for V.35 or RS-530.
When the local loop back switch is activated, an internal 511 bit pseudo
random test pattern is generated, according to ITU-T, for direct end-to-end
integrity testing. The Err indicator LED flashes for each bit error detected.
Multiple clock source selection provides maximum flexibility in
connecting both the T1 and user data interface. The T1 link may be clocked
from the recovered receive clock, from user data port, or from an on-card
oscillator.
When the TRM-01 is ordered with an optional SNMP Card , the card is
placed in slot number 13. Each FT1 Card will have DIP Sw7-6 turned ON to
enable remote setting. In this mode, the other DIP switch settings are ignored
while the
SNMP Card controls all settings (with the exception of termination
impedance). Control is accomplished either via local control on the
asynchronous RS-232 port with an ASCII terminal or via Ethernet and any
standard SNMP network management software. If the
SNMP Card option is
not installed, slot number 13 may hold an additional FT1 Card .
Figure 1-1 : TRM-01 Block Diagram