Lucent Technologies MERLIN LEGEND Release 5.0 Feature Reference page 120

MERLIN LEGEND Communications System Release 5.0
Feature Reference 555-650-110
Features
Basic Rate Interface (BRI)
Other timers and counters used by the system are not programmable.
N200 Counter. Counts the number of times the communications system
can transmit a message on a D-channel because no link layer
acknowledgment is received from the network. The value for this counter
is 3.
N201 Counter. Counts the maximum number of Layer 3 bytes the system
can send or receive in a single D-channel message. The value for this
counter is 260.
N202 Counter. Counts the maximum number of times that Layer 2 should
retransmit TEI-REQUEST frames before notifying Layer 3. The value of
this counter is 3.
K Counter. Counts the number of Layer 3 unacknowledged messages
sent from the communications system to the network on a D-channel. The
value for this counter is 1.
T202 Timer. Minimum time Layer 2 must wait for an acknowledgment of a
TEI-REQUEST frame before initiating retransmission. The value of this
timer is 2 seconds.
T309 Timer. Times the duration of a D-channel data link failure (a loss of
signaling for the entire BRI connection). The value of this timer is 90
seconds.
T310 Timer. Times the network delay following the receipt of a call
preceding message on an outgoing call. The value of this timer is 60
seconds.
T313 Timer. Times the delay in network response when the
communications system sends a connect message that indicates the
completion of an incoming call. The value of this timer is 4 seconds.
!
Call Processing
An explanation of incoming and outgoing call processing follows.
Incoming Calls
BRI calls can be received on personal line or Pool buttons, or by calling groups or
the QCC Queue. Incoming calls appear to a user just as those on other types of
lines do.
Display Operation. The display provides call-related information about incoming
BRI calls delivered over the B-channel, if available. If calling party information is
available and the receiving telephone is an MLX telephone, the information is
displayed on the telephone. Called party information is usually displayed on the
second screen of the MLX display.
CAUTION:
After initial installation, these timers rarely if ever should be changed.
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Issue 1
June 1997
Page 88
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