Specifications

Reference Guide 3-27
System Configuration and Operation Assigning Time Slots to a User Card
The following sections of this chapter describe several ways for you to administer your
networks and correctly allocate transmission bandwidth to meet your needs. The next section
deals with assigning time slots to the user voice and data card. The second section describes a
time-saving tool known as the
Configuration
option, which automatically assigns sequential
WAN time slots to the ports of user voice cards.
The third section deals with cross-connecting WAN time slots to other WAN time slots. The
fourth section addresses a special application that supports the ability to broadcast a data
signal over multiple WAN aggregates.
The fifth section describes signaling status, signaling, and companding conversion. The last
section shows you how to view the time slot map after making your assignments and
cross-connections.
This chapter defines "assigning time slots" as the process of connecting user card ports to
WAN ports and time slots, and it defines "cross-connecting time slots” as the process of
connecting WAN time slots to other WAN time slots in the system.
3.10 Assigning Time Slots to a User Card
You must use a
time slot map
to specify the connections between all incoming and outgoing
lines connected to the system. The time slot map lets you split up your T1 and E1 bandwidths
into portions required for normal voice and data communications. It contains the connections
for all cards in your system.
The integrated access system can work in two different modes. The
drop-and-insert
mode lets
you route part of the bandwidth of one T1/E1 link to the user voice and data cards. The system
also automatically routes the remaining bandwidth of the originating link to another WAN
link.
The
terminal
mode lets you route the bandwidths of both T1/E1 links to user voice and data
cards, but you cannot route any parts of one link’s bandwidth to another link in the terminal
mode. This mode terminates the individual time slots of all system WAN ports at the voice and
data cards.
The time slot assignments depend on your networking needs. Figure 3-15 shows typical time
slot assignments for a drop-and-insert system with an E&M voice card and an HSU data card
on a T1 link. In this example, WAN port 1-1 time slots (TS) 1 through 8 are assigned to ports
1 through 8, respectively, of the E&M card. Time Slots 9 to 16 of the same WAN port are
assigned to port 1 of an HSU data card. This port is a high-rate data port that requires eight
time slots.
The remaining time slots of WAN port 1-1 are automatically cross-connected to the same time
slots of WAN port 1-2. These cross-connections pass data through the system from WAN port
1-1 to WAN port 1-2.