The TransTalk 9000 system enables you to use several different phone and carrier models in the same zone, but there are some compatibility issues to consider. You need to know the following:
■The name of the MDW phone (9000, 9010, or 9030P), located in the battery compart- ment of the handset. (For an MDW 9000 phone, you also need to know the Apparatus Code, also located in the battery compartment of the handset.)
■The model number of your carrier, located on the left side of the carrier.
The following illustration shows which phone models and carriers can be used together:
Single Carrier Installation
If you have a Model 117A1 Carrier...
Use only...
MDW 9000 phones (Code 7815H)
If you have a Model 117A1A Carrier, Model 117A2 Carrier, or Model 117A3 Carrier...
You can use...
MDW 9000 phones (Code 7815H)
MDW 9000 phones
(Code 7815H03A)
MDW 9010 phones
(Code 7815H04A)
MDW 9030P phones
(Code 7815H05A)
Note: You can use Code 7815H phones together with other phones only in a Model 117A1A, Model 117A2, or Model 117A3 single carrier installation.
Multiple (3 Max) Carrier Installation
If you have multiple Model 117A2 or Model 117A3 System Expansion Carriers (or both)...
Use only...
MDW 9010 phone
(Code 7815H04A)
MDW 9030P phone
(Code 7815H05A)
Note: Multiple carrier installations must use MDW 9010 phones and/or MDW 9030P phones. MDW 9000 phones cannot be used in multiple carrier installations.