Linksys SPA9000 - Appendix B: Configuring the Nighttime Auto-Attendant; Instructions for Setting Up the Nighttime Auto-Attendant

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Linksys SPA9000 Administrator Guide
Document Version 3.01
Chapter 3 Configuring Voice Service and Voicemail
Managing Voicemail
Voice-Message: 2/8 (0/2)
Note Note that SPA9000 does not require the NOTIFY to be sent within the same subscription dialog. That
is, it accepts the NOTIFY even without a TO-tag or a matching Call-ID as the original SUBSCRIBE.