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10 — Configuring the T1/E1 CE port
The far-end CE card applies trunk conditioning in the ingress direction when the
near-end CE card detects the following interface faults:
•
AIS
•
LOS
•
RAI
When a T1 or E1 CE port detects an AIS, LOS, or LOF condition, it also transmits
an RAI indication in the egress direction. When the E1 CE port detects a TS16 AIS
or TS16 LOF condition, it also transmits a TS16 RAI indication in the egress
direction.
A T1 or E1 CE port detects an LCD for a channel when all cells stop arriving on that
channel from the ATM network. When the Speed Touch 591s detects the LCD fault,
it applies trunk conditioning in the egress direction on the channel on which the fault
occurred. The card also applies trunk conditioning to the corresponding channel at
the opposite end of the ATM connection.
On a T1 or E1 CE port, the channel uses the trunk conditioning values of the channel
that detected the fault to apply trunk conditioning.
The Speed Touch 591s supports three trunk conditioning modes; see Table 10-5.
Function
The Speed Touch 591s sends the signaling option CODE1 on the signaling path for
the duration of failure. The user configures the data path according to the options in
Table 10-7.
The Speed Touch 591s sends the signaling option CODE1 on the signaling path for
the duration of 2.5 s, followed by CODE2 for the duration of the failure. The user
configures the data path according to the options in Table 10-7.
The signaling path has the signaling option frozen to its last value. The data path is
passed transparently for channels on the Speed Touch 591s. The data path pattern is
set to all 1s for channels on the Speed Touch 591s for faults that preclude the reception
of a valid data pattern from the interface, such as LOF.
The bit pattern transmitted for trunk conditioning on the signaling path can be
configured. Table 10-6 lists the configuration options for the signaling path.
Function
Transmits the bit pattern during the first 2.5 s of
failure, when the channel is configured to transmit
idle fault signaling. The default is 1101.
Transmits the bit pattern for the remaining duration of
the failure, when the channel is configured to transmit
seized fault signaling. The default is 1101.
10-12
•
TS16 AIS (E1 only)
•
TS16 LOF (E1 only
•
TS16 RAI (E1 only)
Table 10-5 Configuring options for trunk conditioning
Table 10-6 Signaling path options for trunk conditioning
Bit pattern
ABCD, where ABCD is 0000
to 1111
ABCD, where ABCD is 0000
to 1111
Speed Touch 591s Technical Practices
90-8785-01
February 2001
Softkey
IDLE
SEIZED
DISABLE
Softkey
CODE1*
CODE2
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