AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 284

T1/PRI Review
c. For the model number(s) of the CSU(s), do one of the following:
d. In the connection block(s), describe the DS1's far-end connection by
doing one of the following:
e. Describe the clock synchronization sources according to the key at
the lower left of the map.
i. Draw a circle and line from the clock source to the appropriate
ii. Label the circle
10. Make a copy of the T1/PRI Planner for your records and forward the
original to NTM.
As an example, the system described in Figure D 1 shows a processor module
system with two 100D modules.
The communications system in Figure D 1 is configured as follows:
Module 1 in slot 04 is connected to an ACCULINK 3150 CSU that is
approximately 100 cable feet from the control unit. (The DS1 facility is
connected to the PRI network.)
Module 2 in slot 05 is connected to an ACCULINK 3150 CSU that is
approximately 160 cable feet from the control unit. (The far end is another
communications system.)
The primary clock synchronization source is the PRI network connected
to Module 1. Its path is shown by a line and the letter
The secondary clock synchronization path, shown by a line and the letter
S
, is the system internal clock.
If the CSU is the ACCULINK 3150, check the box for the
ACCULINK 3150.
If the CSU is not the ACCULINK 3150, check the Other box and
write the manufacturer's name and model number in the space
provided at the bottom of the page.
If no CSU is needed, check None.
If connected to the telephone company central office, check CO.
If connected to another communications system, check PBX.
If connected to the PRI network, check PRI.
If the facility's type of service is T1, check the type(s) of emulated
trunks. Also, check the Services box if the facility includes services
such as MultiQuest with DNIS.
100D module.
P
for primary,
S T
for secondary, or for tertiary.
P
.
System Planning
D–3