Conditions
Notice
• When this feature is enabled at a site, SIP over TCP is used as the call control protocol. In this case,
all SIP line ports at that site will change to TCP/IP fixed operation and the protocol used by existing
SIP lines (UDP/IP) cannot be used.
• When
this feature is enabled at a site, be aware that all installed V-IPGW and V-SIPGW cards at that
site will be deleted.
• When this feature is enabled, the maximum number of usable V-SIPGW channels will be limited to 64
channels per site or 256 channels for the system.
• When this feature is enabled at a site, V-IPGW cards cannot be used at that site.
• Direct SIP connection can be enabled or disabled on a per-site basis. Changes to this setting will be
reflected after a system reset is performed for the site.
For details, refer to "9.5.1 PBX Configuration—[1-1] Configuration—Slot—Site Property—Main—
SIP
over TCP/IP (V-SIPGW) *)" in the PC Programming Manual.
• When this feature is enabled, the supported audio codecs are as follows:
Codec Sampling Rate
G.711 (μ-law) 8 kHz
G.711 (a-law) 8 kHz
Named Telephone event 8 kHz
Comfort noise 8 kHz
RED/8000 8 kHz
• Inband DTMF signals (except for Flash) received from the PBX's extensions/CO lines can be sent to the
external service clients via the gateway.
• It
is possible to register several external servers and use the failover feature. For details, see "18.1.5 SIP
Server Failover".
• It is not recommended to send faxes to external service clients when using the PBX as a gateway.
Installation Manual References
4.4 Virtual Cards
8.3 SIP CO Lines
PC Programming Manual References
9.5.1 PBX Configuration—[1-1] Configuration—Slot—Site Property—Main
9.9 PBX Configuration—[1-1] Configuration—Slot—V-SIPGW—Shelf Property
9.11 PBX Configuration—[1-1] Configuration—Slot—V-SIPGW—Port Property
5.1.10 DISA (Direct Inward System Access)
Description
An outside caller can access specific PBX features as if the caller is an SLT extension user in the PBX, when
the incoming call destination is a DISA floating extension number assigned to each DISA message. The caller
can have direct access to features such as:
98 Feature Manual Document Version 2016-03
5.1.10 DISA (Direct Inward System Access)
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