Chamberlain EL25 - Manual (Page 10)

Page 9
Programming Multiple Units Overview
Note: You cannot program a unit within a multi-unit chain from a local/remote DTMF phone (Touch-Tone) unless
you know the unit's ID number. Therefore, you can only verify the unit number while programming from the unit's
front keypad.
Up to seven (7) EL25s can be installed on a single telephone line. Each unit must have a “ Unique
Unit ID” number and the “Number of Units in Chain” assigned to it.
If you make an error during an entry, press the asterisk key ( * ) to begin again.
Then
Then
1 Press
2 Unit ID Number (1-7), Then
3 Total Number of Units in Chain (1-7), Then
The unit ID identifies each unit within a chain. Adding or removing EL25s will require the unit ID's to be re-entered.
Factory Setting: Unit ID 1 and Number of Units in Chain 1.
This allows you to verify a unit's number within a chain. When you perform this step, the unit will respond with the
number of beeps corresponding to its unit ID number. Two beeps, for example, mean the unit is number 2 in the chain.
Programming Multiple Units Over
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Programming Multiple Units Over
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Set the Unit ID Number and Number of Units in Chain:
2
Verify Unit Number: 111
Important: This must be performed
for EACH unit in the Chain.
EACH unit in the Chain must have the same “Rings Before Answer”.
EACH unit in the Chain must have the same “Alternate Prefix”.
Unique Unit ID Sequencial Order
Number of Units in Chain “7”
Unit ID “1”
Residence
Unit ID “2” Unit ID “3” Unit ID “7”
Telco Entrance Box
Demarcation Point
Example:
16 Factory Setting - 5 Rings
115 Factory Setting - Normal
Important: