Specifications

7-60
Reference Guide
Model No.
Running Head
WAN Card User Screens and Settings WAN Card
FRAMING
The Framing parameter selects the framing mode of the T1 framer on the PairGain module.
The options are
auto detect
and
unframed
. In “
auto detect
” mode the PairGain framer
switches to the framing mode of the local line. Note that the local lines (or the ACFA framer)
connected to the “master” and “slave” should always have the same framing mode. (e.g. both
“esf”). Communication over the ESF DL bit is possible in “
auto detect
” mode as well as in
“
unframed
” mode.
Note:
The FRAMING field may not be changed at the slave unit.
LINE CODE
The Line Code parameter selects the line code of the PairGain module. The options are “
auto
detect
”, “
b8zs
”, and “
ami
”. If the “LINE CODE” is selected as “b8zs” the ACFA framer is
set to “b8zs” and if the “LINE CODE” is selected as “ami” the ACFA framer is set to “ami.”
The “auto detect” mode is useful when there is an NTU at the other end of the circuit. In “auto
detect” mode the PairGain module switches to the line code of the local line. Note that in “auto
detect” mode the local lines (or the ACFA framer) connected to the “master” and “slave” may
have different line codings. When the “master” is set to “auto detect” or when the “slave”
receives “auto detect” as its “LINE CODE” configuration the ACFA framer is set to “ami” line
code.
Note:
The LINE CODE field may not be changed at the slave unit.
ALARMS
The Alarms parameter informs the user of reversed channels or fatal hardware problems.
Unlike in regular WAN cards where the TX (Transmit) at one end should be connected to the
RX (Receive) at the other end for WAN HDSL (8020) card. Each loop should be connected to
the same loop at the opposite end. If the channels are reversed, it will be indicated by this field
and the modules will not sync. (R: channels reversed at Slave, 1: channels reversed at
doubler1, 2: channels reversed at doubler2). This field is also used to indicate self test failure
of the PairGain module at either end of the circuit, if this happens the card should be removed
and reinserted. (M: self-test failed at Master, S: self-test failed at Slave).
During the first one minute that the PairGain modules have not synchronized yet and after that
whenever the modules loose synchronization this field shows an alarm (N: No Sync).