Specifications

Reference Guide 3-31
System Configuration and Operation Automatic Time Slot Assignment
3.10.3 Cross-Connect Model
The Cross-connect model allows you to access two T1/E1 links for each of four WAN cards,
for a total of eight T1/E1 links. All WAN card connections to other WAN cards are
accomplished through the cross-connect option on the System Main Screen, and must be
individually specified. User cards on systems equipped with a CPU XCON card are assigned
to WAN time slots.
3.11 Automatic Time Slot Assignment
You can automatically assign time slots to voice (E&M, FXS, etc.) cards. by using the
Configuration command in the System Main Screen. Figure 3-18 shows typical time slot
assignments from four E&M cards to an E1 WAN port. The Configuration option
automatically assigns the eight ports of E&M card 1 to time slots 1 through 8, seven ports of
E&M card 2 to time slots 9 through 15, and all eight ports of E&M card 3 to time slots 17
through 24. Time Slots 25 through 31 are similarly assigned to E&M card 4, ports 1 through
7. Time Slot 16 is not assigned to any E&M card ports because it is reserved for
channel-associated signaling (CAS) or common channel signaling (CCS) transmission on an
E1 line.
For a T1 WAN port, the configuration command would assign time slots 1 through 8 to the
eight ports of the first E&M card. Time Slots 9 through 16 would similarly go to the eight ports
of a second E&M card, and time slots 17 through 24 would go to a third E&M card.
Figure 3-18. Automatic Time Slot Assignment Example
To use the Configuration command, first proceed as follows:
1
2
3
4
5
6
7
8
E&M
Card
#1
TS# 1-8
1
2
3
4
5
6
7
8
E&M
Card
#2
1
2
3
4
5
6
7
8
E&M
Card
#4
1
2
3
4
5
6
7
8
E&M
Card
#3
WA N 1- 1 = E1
TS# 9-15
TS# 17-24
TS# 25-31