While if the product interconnects with terminal directly, it is more often that the
subscriber in hold will hear the silence.
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There are 2 types of call transfer, unattendant and attendant.
An unattendant Call Transfer flow is as follows: (suppose there are three subscribers: A, B,
C)
1) A dials the number of B; then B picks up the phone and intend to transfer A’s call to
C;
2) B press hook or flash key, make the call in hold status;
3) When B hears the dial tone, B dial the number of C;
4) C will hear the ring, while A and B will hear the ringback tone;
6.2.1.4
C picks up the phone, and now the call between C and A is established; B will hear
busy tone, and the Call transfer is done successfully.
An attendant Call Transfer flow is as follows: (suppose there are three subscribers: A, B, C)
5) A dials the number of B; then B picks up the phone and intend to transfer A’s call to
C;
6) B press hook or flash key, make the call in hold status;
7) When B hears the dial tone, B dial *99 + the number of C;
8) C will hear the ring, when C picks up the phone, C talk to B;
9) When B hang up the phone, the call between C and A is established and the Call
transfer is done successfully.
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:
:
1) Call Transfer function is only valid for SIP protocol;
2) Presmise: Call Hold function must be enabled at the same time
3) VOIP GATEWAY32 adopts REFER-NOTIFY to realize Call Transfer function (Follow
RFC3515 agreement), so require the server or the equipment interconnected with
to support REFER and NOTIFY;
4) VOIP GATEWAY32 unattendant call flow is based on “Session Initiation Protocol
Call Control– Transfer” (draft-ietf-sipping-cc-transfer-06 March 5, 2006), and its
characteristics are:
a) B who start the Call Transfer will not establish a call with C;
b) During the process of A, who is transferred to, establishing the call with C, B
Содержание MG3000-R
Страница 1: ...VOIP GATEWAY User manual GoHigh Data Networks Technology CO LTD Copyright 2009...
Страница 28: ......
Страница 32: ...Fig 15 SIP QuickSetup Page...
