User`s manual

Table Of Contents
Mediant 2000 & TP-1610 & TP-260
SIP User's Manual 208 Document #: LTRT-68805
After A completed dialing C, A can perform the transfer by on-hooking the A phone.
After the transfer is completed, B and C parties are engaged in a call.
The transfer can be initiated at any of the following stages of the call between A to C:
Just after completing dialing C phone number - Transfer from setup.
While hearing ring back – Transfer from alert.
While speaking to C – Transfer from active.
Blind transfer is performed after we have a call between A and B, and A party decides to
transfer the call to C immediately without speaking with C.
The result of the transfer is a call between B and C (just like consultation transfer only
skipping the consultation stage).
The gateway doesn't initiate call transfer, it only can respond to call transfer request.
8.2 Configuring the DTMF Transport Types
You can control the way DTMF digits are transported over the IP network to the remote
endpoint. The following five modes are supported:
1. Using INFO message according to the Nortel IETF draft:
In this mode DTMF digits are carried to the remote side within INFO messages.
To enable this mode set:
RxDTMFOption = 0
(Protocol Management menu > Protocol Definition submenu > DTMF &
Dialing option > 'Declare RFC 2833 in SDP' = No)
TxDTMFOption = 1
(Protocol Management menu > Protocol Definition submenu > DTMF &
Dialing option > '1
st
to 5
th
Tx DTMF Option' = INFO (Nortel))
Note that in this mode, DTMF digits are erased from the audio stream
(DTMFTransportType is automatically set to 0 (DTMF Mute)).
2. Using INFO message according to Cisco’s style:
In this mode DTMF, digits are carried to the remote side within INFO messages.
To enable this mode set:
RxDTMFOption = 0 ('Declare RFC 2833 in SDP' = No)
TxDTMFOption = 3 ('1
st
to 5
th
Tx DTMF Option' = INFO (Cisco))
Note that in this mode, DTMF digits are erased from the audio stream
(DTMFTransportType is automatically set to 0 (DTMF Mute)).
3. Using NOTIFY messages according to <draft-mahy-sipping-signaled-digits-01.txt>:
In this mode, DTMF digits are carried to the remote side using NOTIFY messages.
To enable this mode set:
RxDTMFOption = 0 ('Declare RFC 2833 in SDP' = No)
TxDTMFOption = 2 ('1
st
to 5
th
DTMF Option' = NOTIFY)
Note that in this mode, DTMF digits are erased from the audio stream
(DTMFTransportType is automatically set to 0 (DTMF Mute)).