61222004L2-5A
Section 61222004L2-5, Issue 1
3
Table 2. SW2 Option Settings
1
(Default settings are indicated in
bold
typeface.)
Switch
Function
Description
SW2-1 ......... Manual Code Select
AMI ................... Alternate Mark Inversion (AMI) is selected
B8ZS .................. B8ZS line code is selected
SW2-2 ......... T1 Framing
2
.............. Selects the T1 framing mode
Unframed ........... Selects Unframed (UFRM) operation; SW2-3 is ignored
Framed.............. Selects Framed operation
SW2-3 ......... Manual Frame Select
SF ....................... Selects Superframe (SF) format
ESF .................... Selects Extended Superframe (ESF) format
SW2-4 ......... NIU Loopback .......... Programs the ADTRAN HDSL2 system to respond to traditional T1 network
Enabled
interface unit (NIU) loop up and loop down codes. For more information, refer to
Disabled
Appendix A
SW2-5 ......... Loopback Time Out
Enabled .............. Loopback Time out is Enabled
3, 4
Disabled............ Loopback Time out is Disabled
SW2-6 ......... Shelf Alarm
Enabled .............. If a CI Wescom 3192-9F Alarm Module is present in slot 29 of the 3192 shelf, the
LOS LED on the module will be
On
when the ALM LED on the H2TU-C is red or
amber
Disabled ............ The LOS LED on the module will not be activated by this H2TU-C. Other
H2TU-Cs in the shelf may still activate the LOS LED independently of this
one
5
1
The H2TU-C transfers the local configuration to the H2TU-R when circuit synchronization is achieved. The H2TU-R
then sets its configuration to match the H2TU-C.
2
The ADTRAN H2TU-R (1221026L6) supports AIS-CI per the definition in ANSI T1.403.CORE-1997. The H2TU-R will
generate an AIS-CI signal toward the network upon receiving unframed all ones from the customer. AIS-CI is not
supported when the HDSL2 system is provisioned for unframed. The purpose of AIS-CI is to indicate that a defect or
failure has been detected in the signal from the customer installation (CI) which would normally lead to the transmission
of ANSI AIS. Since AIS-CI meets the definition of AIS, it may be detected and used for alarm suppression, the initiation
of carrier group alarm (CGA) trunk processing and the development of DS1 performance parameters exactly as ANSI AIS.
3
Loopback time out must be selected prior to initiating a loopback.
4
20-minute time out is the default for Loopback Time out Enabled. 60-minute and 120-minute time outs are also available
from the craft interface.
5
The LOS alarm will be activated if and only if sealing current has been present on the HDSL2 loop.
CAUTION
While the H2TU-C is powered up, changes to
any hardware setting using SW2 will change
only that particular option. All options, which
are being overridden by software settings through
the terminal interface, will remain intact.
Alternatively, while the H2TU-C is powered
down, any hardware setting change will cause
all options to revert to match the hardware
settings. This includes DSX-1 Line Build Out,
Framing, Line Code, NIU Loopback, Loopback
Time Out, and Shelf Alarm settings.
Содержание 3192 H2TU-C
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