2-4 9/24/01

Figure 2-2: Access Bank II - SNMP Top Cover Installation Guide

Top View

T1 LEDs (PER SPAN)
STATE MEANING
OFF Loss of T1 signal, no pulses
received
GREEN Nodal Switch is in frame with
frame bit error rate <10E -5
FLASHING Nodal Switch is in frame, but
GREEN frame bit error rate exceeds 10E-5
RED AIS (unframed all ones)
received from the T1 line
FLASHING Nodal Switch is not framed to
RED the T1 line but no AIS is received
YELLOW Yellow alarm received from the T1 line
FLASHING BPV errors received on the T1 line
YELLOW that are not due to B8ZS line coding
V.35 STATUS LED
STATE MEANING
OFF No T1 channels assigned to V.35
port
GREEN CD and RTS active. T1 channels
assigned and operable
FLASHING V.35 in loopback to equipment
GREEN
RED CD is inactive because assigned
T1 is inoperable
YELLOW CD active RTS inactive
FLASHING V.35 in loopback to T1 line
YELLOW
T1 TEST LEDs (PER SPAN)
STATE MEANING
GREEN Normal operation. Trunk processing,
self test, and network loopback
inactive
FLASHING T1 self test local loopback
GREEN passed
RED T1 self test local loopback
failed
YELLOW Channels held in trunk processing
for this T1
FLASHING Network loopback active for this
YELLOW T1
T1 JACK R48CPIN ASSIGNMENT
1 R1 - Receive ring from T1 line
2 T1 - Receive tip from T1 line
4 R - Transmit ring to T1 line
5 T - Transmit tip to T1 line
7&8 Ground for T1 cable shields
NODAL SWITCH CONTROL SWITCHES
SWITCH FUNCTION OFF ON
SYSTEM SETUP
1 local/remote local remote
2 alarm cutoff enable alarm disable alarm
3 Option 1
4 Option 2
T1 SPAN 1 SETUP
1 Self test 1 off on
2 Network loopback 1 off on
3 T1 framing 1 Superframe Extended
(SF) (also superframe
called D4) (ESF)
4 T1 line coding 1 Alternative B8ZS
Mark
Inversion (AMI)
5 CSU on/off 1 Detect loop Reject CSU
code (normal)loopcode
T1 SPAN 2 SETUP
6 Self test 2 Off On
7 Network loopback 2 Off On
8 T1 framing 2 Superframe Extended
(SF) (also superframe
called D4) (ESF)
9 T1 line coding 2 Alternative B8ZS
Mark
Inversion (AMI)
10 CSU on/off 2 Detect loopReject CSU
code (normal)loopcode
NODAL SWITCH ANALOG LEVELS
SWITCH FUNCTION LEVEL
Six switchesTransmit = Off adds loss
per channelAnalog to T1
Receive = All switches off =
T1 to analog0 dB
1 Receive -2 dBOff = 2 dB lower
2 Receive -3 dBOff = 3 dB lower
3 Receive -4 dBOff = 4 dB lower
4 Transmit -2 dBOff = 2 dB lower
5 Transmit -3 dBOff = 3 dB lower
6 Transmit -4 dBOff = 4 dB lower
NODAL SWITCH ANALOG SIGNALING
SWITCH LABEL FUNCTION
Four Four switchesOff adds loss
switches set card sig-
per card naling options Consult manual for
for all 12 chansignaling option settings
per voice card type
1 Option A Off = normal FXS
2 Option B Off = normal FXS
3 Option C Off = normal FXS
4 Trunk proces-When TP or test:
sing (TP) On = loop busy
Busy/Idle Off = loop idle
BACKPANEL CHANNEL LEDs
COLOR PER CHANNEL FUNCTION
OFF Idle (FXS ground start , tip open
GREEN Incoming call (FXS loop start
RED Outgoing call
YELLOWAnswer (taking) condition

Tip & Ring

Connector

10 BASE T ACTIVITY LED
STATE MEANING
OFF No data RX/TX
GREEN RX/TX Data
RED Collision detected
10 BASE T LINK LED
STATE MEANING
OFF No signal received
GREEN Validate connection