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Quick Reference Troubleshooting Guide 

Avaya EHS Adapters 

Scope 

This document is intended to provide basic guidelines for technical support staff answering support 
questions from customers experiencing difficulties with the Avaya EHS adapters. 

Requirements 

Telephones 

Table 1 highlights the different phones supported by each EHS adapter. For some phones 
restrictions apply on the telephone firmware version, switch type etc. These restrictions are also 
listed. It is very important to note that the Avaya Model 2420 phone only works reliably with 
Electronic Hook Switch when it is connected to an IP switch. Older digital switches are not 
guaranteed to work. 
 

Avaya EHS 

Avaya Phone Model 

Remarks 

1 2420 

Only supported on IP switches, Firmware 4.0 or higher, Incoming 
call signaling is supported with only a single ringtone. 

1 4610 

Only supported on IP switches, Firmware 4.0 or higher, Incoming 
call signaling is supported with only a single ringtone. 

4620/4620 SW  

Only supported on IP switches, Firmware 4.0 or higher, Incoming 
call signaling is supported with only a single ringtone. 

4621/ 4621 SW 

Only supported on IP switches, Firmware 4.0 or higher, Incoming 
call signaling is supported with only a single ringtone. 

4622/4622 SW  

Only supported on IP switches, Firmware 4.0 or higher, Incoming 
call signaling is supported with only a single ringtone. 

1 4625/4625 

SW 

Only supported on IP switches, Firmware 4.0 or higher, Incoming 
call signaling is supported with only a single ringtone. 

1 4630/4630 

SW 

Only supported on IP switches, Firmware 4.0 or higher, Incoming 
call signaling is supported with only a single ringtone. 

1 5420 

Only supported on IP switches, Firmware 4.0 or higher, Incoming 
call signaling is supported with only a single ringtone. 

2 2410 

Firmware must be 1.8 or higher. Incoming call signaling is 
supported with only a single ringtone. 

2 5410 

Firmware must be 1.8 or higher. Incoming call signaling is 
supported with only a single ringtone. 

2 5610 

Firmware must be 1.8 or higher. Incoming call signaling is 
supported with only a single ringtone. 

9620 

Ring indicator is not supported 

9630 

Ring indicator is not supported 

 
Table 1 – Supported phones by each Avaya EHS adapter 

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