Cortelco 2750 - Manual (Page 13)

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Follow the instructions below to install or replace the batteries.
a. Make sure the AC cord is attached to the telephone and to a working electrical outlet.
b. Turn the telephone over.
c. Remove desk pedestal/wall mount bracket if attached.
d. Remove battery door cover by using the tip of a ball-point pen, paper clip, or similar object to
release the battery door tab.
e. Remove the old battery.
f. Insert 3 new AAA size alkaline batteries. Note that we recommend ONLY alkaline batteries.
g. Close the battery cover.
1.3.4.4 Assign a Station Number
Station 01 must be the first extension number assigned. Station 01 is required for programming
features on the 2750. Refer to Section 2.1 for detailed instructions on assigning station numbers.
1.3.5 Test Installation
This procedure should be used at each telephone after initial installation. It may also be used if you are
having problems with your system. First, verify the three items below at each telephone in the system.
a.
Verify that the AC power transformer is connected to the 2750 and to mains power.
b. Verify that Line 1 is connected to the 2750.
c. Verify that a station number has been assigned.
Now, verify that Line 1 has been connected correctly to all telephones.
d.
Press Line 1 at one telephone.
e. Verify that the Line 1 LED is Green, the Speakerphone LED is red and that dial tone is heard.
f. Verify that the Line 1 LED is red at each other station.
To verify the connection of lines 2 – 4, perform the following steps at each telephone.
a.
Press Line 1.
b. Verify that the Line 1 LED is Green, the Speakerphone LED is red and that dial tone is heard.
c. Dial the telephone number for Line 2. Verify that the Line 2 LED flashes slowly. If it does not
flash, Line 2 may not be properly connected.
d. Repeat the steps above using the telephone numbers for Lines 3 and 4 if applicable. Remember
that Lines 2, 3, and 4 may not be common at all telephones.