Linksys SPA2101 Configuration Manual page 3

 Auth ID: type user details
8.4. Under Supplementary Service Subscription
 Call Waiting Serv: no
 Three Way Conf Serv: no
8.5. Under Audio Configuration
 Preferred Codec: G711u
 Use Pref Codec Only: yes
 Silence Supp Enable: no
 Echo Canc Enable: no
 Change "fax enable = T38" to No
9. Click Submit All Changes to save all.
Regency 5000 ‐ Linksys SPA2101 Phone Adapter Configuration Guide.Docx
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