Pub. 42004-338K
Rugged Analog Auto-Dial Telephones
Page 8 of 21
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Model 257-001
1.
Open the front door and remove the
four outermost screws from the mid-
section using a standard Phillips
screwdriver.
2.
Pull the enclosure apart until
encountering a slight resistance on the
left side.
3.
Open the front half of the enclosure to
the left until the length of the telephone
cord inside the enclosure can be
disconnected from the PCBA terminal
strip, if connected (see Figure 10).
4.
Pull on the left side of the enclosure
until the hinge plugs pull loose to
separate the front and rear halves.
5.
Set the front half of the enclosure
aside.
6.
Conduit Installations:
See the Conduit Installation Details section.
If using the gland bushing provided with the unit:
Drill a 0.688-inch diameter hole at either drill spot
on the bottom of the rear enclosure.
7.
Push the free end of the telephone cord through the gland bushing using needle-nose pliers.
Allow 8–10 inches of telephone cord to extend past the bushing.
8.
Tighten the bushing around the cord.
9.
Feed the free end of the telephone cord through the hole in the enclosure.
10.
Secure the bushing in the hole with the supplied locknut using a 7/8-inch wrench and channel locks to
tighten.
11.
Mount the enclosure on the wall using four ¼-20 machine screws with nuts and washers or with four
#14 wood screws of the appropriate length for the mounting surface (see Figure 10).
12.
Outdoor Installations:
Install a (customer-supplied) telephone line suppressor on the telephone line.
13.
Connect the telephone cord to the PCBA terminal strip (see Figure 7).
14.
Close the front half of the enclosure and secure it by replacing the four outermost screws.
15.
Connect the telephone’s modular cord to the incoming subscriber line with the appropriate mating
connector.
16.
Verify operation by calling to and from another telephone.
Figure 9. Model 257-001 Outline Drawing