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Section 61245002L6-5, Issue 3
61245002L6-5C
4. CONTROL PORT OPERATION
The Litespan HTU-C provides a faceplate-mounted
female DB9 connector that supplies an RS232
interface for connection to a controlling terminal. The
pinout of the DB9 is illustrated in Figure 5. The
linecard must be provisioned through the control port.
Switches or jumpers are not provided.
The terminal interface operates at data rates from
1.2␣ kbps to 19.2 kbps. The asynchronous data format
is fixed at 8 data bits, no parity and 1 stop bit. The
supported terminal type is VT-100 or compatible.
NOTE
If you are using a personal computer (PC)
with terminal emulation capability, be sure
to disable any power saving programs.
Otherwise, communication between the PC
and the HDSL unit may be disrupted, resulting
in misplaced characters or screen timeouts.
For abbreviations used in the screen diagrams, see
Table␣ A.
Figure 5. RS232 (DB9) Connector
6
7
8
9
1
2
3
4
5
TXD (Transmit Data)
RXD (Receive Data)
SGN (Signal Ground)
Table A. Screen Abbreviations
Abbreviation
ES .......................
SES .....................
UAS ....................
SF ........................
ESF .....................
B8ZS ...................
AMI ....................
LBO ....................
BPV ....................
NIU .....................
S/N ......................
15M ....................
24H .....................
Definition
Errored seconds
DSX/DS1
SF ................ Second in which a BPV or frame bit error occurs
ESF ............. Second in which a BPV or CRC error occurs
HDSL .................. Second in which a CRC error occurs
Severely errored seconds
DSX/DS1
SF ................ Second in which 1544 BPVs or 8 frame bit errors occur
ESF ............. Second in which 1544 BPVs or 320 CRC errors occur
HDSL .................. Second in which a 165 CRC error occurs
Unavailable seconds
DSX/DS1 ............ Second in which there is a loss of signal or sync
HDSL .................. Second in which there is a loss of signal or sync
Superframe format
Extended superframe format
Bipolar with 8-zero substitution
Alternate mark inversion
Line build-out
Bipolar violation
DSX/DS1 ............ Second in which a bipolar violation occurs
T1 Network Interface Unit
Serial number
Fifteen-minute period
Twenty-four-hour period
