© Sage Instruments 2000
9100-2930-02 01/31/00
5-112
Section V Option Menu Numbers
Option Menu #:
56
5-56 OPTION MENU #:56 64-KBIT E1 BERT
OPTION MENU #:56, 64-KBIT E1 BERT, is available only when
Purchased Option 930i-23, Extended
Bit Error Rate (BERT), has been installed. This feature enables you to test an E-1 span at the 64 KBps
rates. It does not test individual sub-rates such as 9.6 KBps.
To measure the 64-KBit E-1 bit error rate:
1. Press the Trunk Type function key. Select PCM and
TERMINATE
or
D&I
mode. (Refer to
Section 3, PCM Operation,
for setup information in the PCM trunk type.)
You cannot pass 64 KBit E-1 BERT successfully unless you selected a
CLEAR-CHANNEL
.
2. Connect the 930i test cords for
terminated testing as shown in
Figure 5-56.1.
In the above example the 930i
has been connected at the
Equipment side of the
customer's E1 Channel Service
Unit (CSU). The testing is
toward the Channel Bank.
There is an Office Channel Unit
(OCU) data port plugged into
time slot 7 or channel 7 on the
bank. The 64 KBps output from
the OCU is fed to a combination
Channel Service Unit/Data Service Unit (DSU) which interfaces to the Data Terminal Equipment
(DTE). To test the path successively, loopback the devices on the path and run a BER test until
errors are found. Start by looping the OCU, then the 64 KBps CSU, and finally the DSU.
C
S
U
D
S
U
64 KBps
D
T
E
O
C
U
CHANNEL
BANK
E1 SPAN
E1 CSU
E1 SPAN
930i PCM TRUNK SETTINGS:
MODE: TERMINATE
CLOCK: EXTERNAL
IMPEDANCE: 120/75 OHMS
FRAME: UNFRAMED
LINE CODE: AMI
AA
1
A
A
A
A
A
A
2
A
A
A
A
A
A
3
930A Communications Test Set
AA
7
8
9
AA
AA
4
5
6
0
ST
Off Hook
On Hook
Orig
Term
Trunk
Type
Dial/
Ring
Return
Loss
Send
Tone
Measure
Tone
Measure
Noise
Option
Menu
Volume
TelSet
AA
AA
KP
AA
A
STP
AA
C
ST3P
AA
AA
B
ST2P
AA
AA
D
On Hook
Off Hook
T
1
R
1
TR
SB/SG
E/M
IN
OUT
PCM
ANALOG
STTP/PCM
SAGE
INSTRUMENTS
0 BIT ERRS PCM1 CH#7 MENU
Figure 5-56.1
E-1 BERT Configuration
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