PRI installation: ST, STE, 21, 21E
Page 29 of 188
ISDN PRI Installation
7
show ST, STE, 21, 21E
PRI cabling. Refer also to
.
8
If required, install connecting blocks at MDF or wall-mounted
cross-connect terminal.
9
If required, designate connecting blocks at MDF or wall-mounted
cross-connect terminal.
10
If required, install CSU or Echo Canceller.
11
Cross-connect PRI circuits.
12
Add related office data into system memory. Refer to the work order.
13
Run PRI verification tests.
Table 6
Transmission equalization switch settings for PRI
Switch S2 settings
To repeated facility
To cross-connect point
5 ON
2, 4, 6 ON
1, 3, 7 ON
0–45 m
(0–150 ft)
46–135 m
(151–450 ft)
136–225 m
(451–750 ft)
0–30 m
(0–100 ft)
31–100 m
(101–355 ft)
101–200 m
(356–655 ft)
Switch 3 options for PRI/DTI with ESF
SW3-1
ON
OFF
=
=
extended superframe format (ESF)
superframe format (SF)
SW3-2
ON
OFF
=
=
B8ZS line encoding (required for 64K clear option)
AM1 line encoding
SW3-3
ON
OFF
=
=
facility data link (FDL) yellow alarm method (cannot be used in Canada)
Digit 2 yellow alarm method
Note 1:
All switch positions for S2 (location B22) are OFF except as shown under the column labeled
“Switch S2 settings.” The 8-pole SW3 (location E37) switch positions are OFF except as shown for “Switch
3 options for PRI/DTI with ESF.”
Note 2:
For D2, D3, or D4 framing formats (superframe formats), set all SW3 options to OFF.
