Lucent Technologies MERLIN LEGEND Release 6.1 - Page 143

MERLIN LEGEND Communications System Release 6.1
Feature Reference 555-661-110
Issue 1
August 1998
Features
Page 94Basic Rate Interface (BRI)
■ T308 Timer. Times the delay in network response when the
communications system sends a release message to clear a call.
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.
CAUTION:
!
After initial installation, these timers rarely if ever should be changed.
Call Processing 3
An explanation of incoming and outgoing call processing follows.
Incoming Calls 3
BRI calls can be received on personal line or Pool buttons, or by calling groups or
the QCC Queue. Incoming calls on BRI lines appear to a user just like calls on
other types of lines.
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