
for access during maintenance. Note clearances required for removing the Environmental Housing. See Figure 2 for mounting clearances.
2.Place the mounting bracket 3/4" spacers between the rear of the mounting bracket and the mounting surface. The spacers are required to insure the mounting bracket is not warped during installation or use.
3.Insert the 1/4" x 11/2" Hex head lag screws through the mounting holes of the mounting bracket and spacers. Tighten securely with a 7/16" nut driver.
9.0"  | 
  | 
8.5"  | 
  | 
1.0"  | 1.0"  | 
6.0"  | 
  | 
Figure 2. Clearances
Install the T400 Environmental Housing
1.Fasten the Environmental Housing to the mounting bracket using the two mounting bracket bolts.
2.Tighten the two bolts using a 7/16" nut driver to 25 
Power Modules in the central office should be removed or ![]()
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 and maintenance of the T400 Single EnvironmentalHousing. AppropriateMethods and Procedures should be followed to insure
personal safety.
Network Wiring
1.Remove the network cover on the base using a 7/16" nut driver.
2.Connect the wiring in the terminal blocks as shown in Table A. The terminal block will accommodate a #6 Spade Lug.
Mounting  | 
Holes  | 
5 3/8 "  | 
3/4"  | 
43/16 "  | 
Figure 3. Mounting Holes
3.Connect the ground cable to an appropriate ground. (Surge arrestors work only when the ground cable is connected.)
4.Replace the network cover on the base using a 7/16" nut driver. Tighten to 20 
Customer Wiring
1.Remove the customer cover on the base using a 
2.Connect the wiring in the terminal blocks as shown in Table A. The terminal block will accommodate a #6 Spade Lug. The terminal blocks are shown in Figure 4.
3.Replace the customer cover on the base using a 
5  | 15  | 49 55 NC | 7  | 13  | 41 47  | 11  | 
CUSTOMER ACCESS  | 
  | 
  | WARNING!  | 
  | ||
  | COVER TO BE  | |||||
  | 
  | 
  | REMOVED BY TELEPHONE  | |||
  | 
  | 
  | COMPANY PERSONNEL  | |||
NETWORK INTERFACE DEVICE  | 
  | 
  | ONLY  | 
  | ||
Figure 4. Wiring Terminals
Remove the Environmental Housing Cover
1.Wipe any debris from the cover and base.
2.Remove the two housing cover bolts using a 7/16" nut driver.
2  | 
  | Section   |