Lucent Technologies 6000 - Manual (Page 49)

Configuring WAN Access
Introduction to WAN configuration
MAX 6000/3000 Network Configuration Guide 3-5
Assigning telephone numbers
A MAX unit receives calls on telephone numbers assigned to its T1 or E1 and (if applicable)
Net/BRI channels. Each number has a limit of 24 characters, which can include the following:
1234567890()[]!z-*#|
To assign the numbers, you must understand add-on numbers, hunt groups, and Service Profile
Identifiers (SPIDs).
Add-on numbers
You build multichannel calls (MP, MP+, AIM, or BONDING) by specifying add-on numbers.
A multichannel call begins as a single-channel connection to one telephone number. The
calling unit can then request and store additional numbers that it dials to connect additional
channels. To add channels to the call, the calling unit must integrate the add-on numbers with
the number it dialed initially. The parameters you set to specify add-on numbers depend on the
type of line you are configuring. For a T1 or E1 line, set the Ch N# parameters. For a BRI line,
set the Pri Num parameter. For some BRI lines, (that is, for multipoint mode) you must also set
the Sec Num parameter.
The group of channels used for a multichannel call is called a bundle. A 10-channel bundle, in
which each channel is 64Kbps, provides a 640 Kbps connection. Typically, the telephone
numbers assigned to a bundle share a group of leading digits. Enter only the unique digits
identifying each number, as follows:
• If the add-on number in the called unit is shorter than the telephone number dialed by the
calling unit, the MAX unit replaces only the rightmost digits. For example, suppose you
dial 777-3330 to reach channel 1 of line 1, and dial 777-3331 through 777-3348 to reach
other channels (on the same line or a different line). In this case, set Ch1# to 30, and set
the Ch N# parameter for each of the other channels to 31, 32, and so forth.
• If the add-on number is longer than the number dialed, the unit discards the extra digits.
For example:
– Ch1#=510-655-1212
– Dial#=655-1212
– Derived number for channel 1=655-1212
• If there is no add-on number, the derived number equals the dialed number. For example:
– Ch1#=(null)
– Dial#=555-1213
– Derived number for channel 1=555-1213
Note: The most common reason multichannel calls fail to connect beyond the initial
connection is that the answering unit sends the calling unit add-on numbers it cannot use to dial
the other channels. For example, AIM and BONDING call bundles should not span dial plans.
If you are receiving AIM or BONDING calls and have multiple dial plans, set up each dial
plan as a separate trunk group. This also prevents MP and MP+ call bundles from spanning
dial plans. If you have, for example, two PRI lines from different service providers, you might
set the ChN Trnk Grp parameters for the first line to 9 and for the second line to 8. For more
information about trunk groups, see “Enabling trunk groups” on page 3-69.