Interalia XMU+, Installation Handbook, Page: 21 / 63

XMU+ Installation Handbook rev.06
15
Applying T1 Line Card Settings
Applying T1 Line Card Settings
T1 is a high-speed, dedicated connection that is capable of transferring digital signals at
1.544 Mbps (megabits per second).
The XMU+ T1 line card provides support for industry standard T1 digital
communication interfaces. It lets the XMU+ connect to a T1 communication link,
which provides 24 T1 user channels, each capable of 64Kbps (kilobits per second).
When placed in a small chassis XMU+, the T1 line card controls all the lines. When
placed in a large chassis XMU+, T1 line cards can only be placed in the 1st and 5th
slots, since they control not only the slot they are placed in, but also the following 3
slots.
For example, when a T1 line card is plugged into slot 1, it controls all of the lines in
slots 1 to 4, but slots 5 to 8 remain available for other line cards.
The following table maps the 24 T1 channels to the XMU+ lines:
T1 Channel... 1 2 3 4 5 6 7 8
XMU+ Slot 1: Line 1 2 3 4 5 6 7 8
T1 Channel 9 10 11 12 13 14 15 16
XMU+ Slot 2: Line 1 2 3 4 5 6 7 8
T1 Channel 17 18 19 20 21 22 23 24
XMU+ Slot 3: Line 1 2 3 4 5 6 7 8
Note:
Slot 4 is used to control slots 1, 2, and 3.