Interface Board (T1Ib) - Vodavi Starplus Triad 1/2/3 Installation Manual

CO/PBX Connections
T-1 Interface Board (T1IB)
The T1IB board allows the network connection to a T-1 (1.544Mbps, 24
Voice Channel) digital interface.
The T1IB contains T-1 interface circuit, control circuitry, and synchronous
clock control circuits. DTMF tone detection units can be installed
optionally on the T1IB. The T1IB has 8 LEDs on the front edge of the PCB
which indicates errors of T-1 line, in-use status, and synchronous clock
enable status.
LED
1
2
3
4
5
6
7
8
The T1IB contains 3 switches and 2 connectors. The Normal/Service
switch is used during maintenance to place the card in an Out-Of-Service
(OOS) mode. The clock selection switch is used for control synchronous
clock. The Line Build-Out switch is controlled by distance between the
Triad 3
The PLLU must be installed on the MPB for the T-1 card to operate
properly.
Software 2.1G or neweris needed when using any T-1 cardthat contains
1.0G Firmware. Without the newer software, the T-1 card will not work.
Table 3-10: T-1 Board LEDs
IN USE At least one of the 24 circuits is in use.
RED T1IB is in RED alarm due to any alarm.
H/W TEST Normal call processing is not available.
BLUE T1IB has detected RX_BLUE alarm.
YELLOW T1IB has detected RX_YELLOW alarm.
OOF T1IB is Out of Frame synchronization
RCL T1IB receives Carrier Loss (un-plugged from the cable)
CLOCK Clock Enable/Disable T-1 Ordering Information
System and a CSU and the Switch #4 is used for loopback control.
Function
3-49