SpectraLink i640 - Manual (Page 8)

SpectraLink Corporation SIP User Agent: Features and Standards
6. Supported Methods
Method Received? Transmitted?
ACK Yes Yes
BYE Yes Yes
CANCEL Yes, only for INVITE method Yes, only for INVITE method
INFO Yes, body ignored Yes, for dtmf-relay
INVITE Yes Yes
MESSAGE No
No
NOTIFY Yes Yes
OPTIONS Yes Yes
PRACK Yes Yes
REFER Yes Yes
REGISTER No
Yes
SUBSCRIBE No, implicit subscriptions only Yes, implicit and mail center
only
UPDATE No No
Part Number: 72-1089-01-C.doc Page 8