4
Issue 1, December 2003
61223404L2-5A
3. PROVISIONING
There are no configuration switches for the H4TU-C.
Configuration is performed via software. For more
information, refer to the
section of this practice.
The provisioning settings can be viewed and manipu-
lated through management access via the front panel
RS-232 port.
lists the available provisioning
options and their factory default settings.
Table 4. Provisioning Options
Provisioning Option
Option Settings
Default Settings
1. DSX-1 Line Build Out
0-133 ft., 133-266 ft., 266-399 ft.,
399-533 ft., 533-655 ft.
0 to 133 ft.
2. DSX-1/DS1 Line Code
B8ZS, AMI
B8ZS
3. DSX-1/DS1 Framing
SF, ESF, Unframed, Auto
ESF
4. Force Frame Conversion
1
Disabled, Enabled
Disabled
5. Smartjack Loopback
Disabled, Enabled
Enabled
6. Loopback Time Out
None, 120 Min
120 Minutes
7. Latching Loopback Mode
2
T1 (Disabled), FT1 (Enabled)
T1 (Disabled)
8. DS1 Tx Level
0 dB, -7.5 dB, -15 dB
0 dB
9. Span Power
Enabled, Disabled
Enabled
10. Customer Loss Indicator
3
AIS, Loopback, AIS/CI
AIS/CI
11. Performance Reporting Messages
None, SPRM, NPRM, AUTO (both)
AUTO
12. Loop Attenuation Alarm Threshold
0 (Disabled), 1-99 dB
34 dB
13. SNR Margin Alarm Threshold
0 (Disabled), 1-15 dB
04 dB
14. Remote Provisioning
Disabled, Enabled
Enabled
15. Shelf Alarm
Disabled, Enabled
Enabled
1
The forced frame format conversion (FFFC) mode sets the H2TU-C to ESF and the H2TU-R to SF. This mode should be used to force
SF (DS1 from customer) to ESF (DSX-1 to network) conversion in the absence of network-provided ESF framing.
2
Latching Loopback Mode
• T1 — When optioned for T1 mode, the unit does not respond to DDS Latching Loopback codes.
• FT1 — DDS Latching Loopback operation is supported. The H4TU-C and any H4R units which are in the HDSL circuit are treated
as identical Tandem Data ports and the HTU-R is treated as a different Tandem Data port.
NOTE: When operating in FT1 mode and during periods of T1 loss of signal, LOS, or T1 AIS from the customer CI, the HDSL
system will send in the network direction from the HTU-C a Fractional DS1 idle signal consisting of a repeating 7E (HEX) byte
payload within a framed/unframed T1 signal. In addition, when optioned for FT1 mode, the setting for Customer Loss Response is
ignored.
3
Customer Loss Indicator
• AIS — Send AIS to network upon T1 loss of signal or T1 AIS from customer.
• LPBK — HTU-R initiates a network loopback upon T1 loss of signal or T1 AIS from customer.
• AIS/CI — HTU-R sends customer disconnect indication upon loss of signal, loss of synchronization, or receipt of T1 AIS from
customer.
NOTE: The CI is generated by transmitting the framing received from the network while overwriting the payload with a repeating
pattern. For applications where the DS1 is Extended Superframe, the data link is overwritten with a Yellow Alarm that is interrupted
once every second by a 100 milli-second code burst of 7E (HEX).
