Switch User Manual

Conﬁguring the Subscriber Table

4-4 Conﬁguring the Subscriber Table

Algorithm

The algorithm Þeld allows you to select the means by which call requests are

forwarded to one of several routing paths assigned to the named subscriber. You

can select from among four options:

Round Robin As its name implies, this algorithm selects ports

cyclically in numeric order (as conÞgured in the Routing

Table). If a selected port is unreachable or congested, call

requests are forwarded on to the next port in sequence.

Line Failed The Alternate Route on Line Failure algorithm selects the

Þrst listed port that is not in a failed state. If the selected

port does not make the connection, the call request will

be cleared, even if other ports are available.

Line Busy The Alternate Route on Line Busy algorithm selects the

Þrst port that is not busy. If that port has failed, the next

available port will be selected.

Least LCN The Least LCN with Throughput algorithm selects the

line with the smallest load, calculated using the weight

(speed) and number of virtual circuits in use on that line.

(Weights are assigned to each line in proportion to their

throughput within the routing path.)

Systematic Redirect

The Systematic Redirect Þeld allows you to specify whether or not calls to the

named subscriber will be automatically redirected to the Þrst alternate subscriber

speciÞed in the Address Table (described beginning on page 4-6). If you select yes,

the original subscriber is skipped and all calls designated for that subscriber will

be redirected to the Þrst alternate address, regardless of the condition of either

path. Any additional conÞgured alternate addresses are ignored.

Redirect Busy

If you enable the Redirect Busy option, calls to the named subscriber will be

redirected to the alternates listed in the Address Table if the primary subscriber

device is busy. Again, be sure youÕve conÞgured the alternate addresses in the

Address Table.

Redirect Out-of-Order

The Redirect on Out-of-Order option allows you to specify that calls to the named

subscriber device will be redirected to the alternate subscribers if the primary

device is out of order.

TIP

The alternate routes used by these algorithms are speciÞed in the Routing Table, described

beginning on page 4-5; if you do not wish to use a routing algorithm, simply accept the

default setting and enter only one routing path.