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Front Panel
TCCOMM.COM
Made in U. S.A.
1 2 3 4
1
2
3
4
RM TLB
L OCLB
LEN2
LEN1
LEDs Functions
Alarm-
ALM:
Alarm indicator. The Alarm LED will light when following conditions occur:
The unit is in a diagnostic mode.
When an invalid line code or line length is set.
Optic signal is lost.
Local T1/E1 signal is lost or all ones signal is received from customer's device.
Remote T1/E1 signal is lost.
When the "Line Distance" setting is set as "1 0 0" (when SW5 is on, and both SW4 and SW3 are
Off).
Power Supply Status-
Power A/B: These LEDs indicate which power source on the rear panel the unit is drawing from. If power redundancy is
utilized, both LEDs will light.
Vcc:
+5V Voltage indicator. This LED should light whenever power is connected to the unit. It indicates the
correct operating voltage is being derived from the power source.
Optic Signal Status-
RxOPT:
Solidly lit, it indicates optical signal received.
Flashes when the optical signal is lost.
SYNC:
Indicates a valid composite signal is being received.
Configuration Setting-
AMI/B8ZS/HDB3: These LEDs indicate the T1/E1 line code setting (SW6, 7, 8).CSU: Channel Service Unit indicator. This
LED will be lit whenever the minimum T1 Line Length is set (see Configuration Table - page 10).
133-655/CSU: These LEDs indicate the T1 Line Length distance setting (SW3, 4, 5).
Local T1/E1 status and warning-
LAIS:
When flashing, it indicates "all ones" signal received from user's equipment.
LLOS:
When flashing, it indicates the loss of the T1/E1 signal from local user's equipment.
BPV:
Bipolar Violation LEDs. These LEDs light when bipolar violations (Line Code violations) are detected. The
severity of the violation is represented by three LEDs. Higher BPV rates cause more LEDs to light.
LOC:
Indicates the Local Loopback function is enabled (SW2 is On).
Remote T1/E1 status and warning-
RLOS:
When flashing, it indicates the loss of the T1/E1 signal from remote user's equipment. This LED will be Off
when no fiber cable is connected or the fiber cable is bad.
RMT:
Indicates the Remote Loopback function is enabled (local SW1 is On).
T1/E1 FIBER OPTIC MODEM
T1/E1 LINE LEN
1
133
2
266
3
399
LAIS
RMT
5 6 7 8
1
2
3
4
AMI
LOOP BACK TEST
B8ZS
H DB3
L EN0
Figure 2. TC1630R/S's Front Panel
OPTIC
Tx
LINE CODE
CSU
AMI
655
B8ZS
533
HDB3
LOC
- 5 -
TC1630R/S User's Manual
Rev. 2.5
RxOPT
ALM
SYNC
A
LL OS
B
RLOS
Vcc
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