# External Line Select from Attendant Consoles (TI/D4)

The External Line Select feature on attendant consoles and supported MiVoice IP Phones allows the attendant or phone user to seize a nominated analog or digital trunk and dial digits over it in order to verify the trunk's "serviceability". The trunk to seize is selected by dialing its associated 4-digit trunk number.

The following phones support the External Line Select feature:

5020 IP Phone 5220 IP Phone 5220 IP Phone (Dual Mode) 5224 IP Phone 5312 IP Phone 5320/5320e IP Phone | 5324 IP Phone 5330/5330e IP Phone 5340/5340e IP Phone 5360 IP Phone Navigator 69xx IP Phones

There are no conditions, programming, or operation instructions for this feature.