TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
89
4
Click “OK”.
12.4 GK – Configuration of the VoIP Interfaces
In the same way as ISDN interfaces lead the world of classical telephony, “GK interfaces”
are channels to the world of Voice over IP. If your VoIP Gateway needs to communicate
with other devices via VoIP, access to these devices has to be configured as a VoIP
interface.
These can be different types of equipment:
• The local or remote PBX
• Other Ascom VoIP Gateways
• VoIP terminal equipment
• VoIP terminal adapters to connect analogue terminals or a DECT base station
• Third-party VoIP Gateway, as a gateway to telephone switches or, for example, into the
SS7 network
• Further gatekeepers for call control
• VoIP PC programs
• Enforce Sending
Complete
Affects handling of "484 Address Incomplete"
responses. If set, the incoming call is released with
cause #28. If not set and the incoming call did not
indicate "sending complete" neither, the gateway waits
for more dialing digits to come and re-tries the INVITE.
• From Header when
Sending INVITE
Interoperability option for outgoing calls. Controls the
way the CGPN is transmitted to the SIP provider.
– Fixed AOR: The From header contains the fixed
registration URI (AOR). The actual calling party number
and name will be transmitted inside the
P-Preferred-
Identity
header.
– AOR with CGPN as display: The From header contains
the fixed registration URI (AOR) with the calling party
number as display string in front of the AOR.
– CGPN in user part of URI: The From header contains
an URI with the calling party number as user part (left
from @).
• Identity Header when
Sending INVITE
Interoperability option for outgoing calls. Controls the
way the CGPN is transmitted to the SIP provider.
• Reliability of
Provisional Responses
Controls which way the extension "100rel" is offered:
Internal Registration
• Protocol
Select protocol, None, H.323, SIP (over UDP), TSIP (over
TCP) or SIPS (over TLS) and enter the protocol specific
parameters.
a. The value defines the period of time for collecting voice data prior to transmitting it as a
voice data packet. Voice transmission is delayed correspondingly. A value of 30 ms is perceived
by the human ear as virtually without delay, a value of 100 ms similarly, does not irritate most
users.
b.Saves bandwidth by not transmitting any data during pauses in speech. Considerable band-
width can be saved in this way, since only one party usually speaks at a time during a conver-
sation. This function can usually be activated without any loss of quality.
