User guide

Functionality 3
About Gateway Features
Direct dialing and call routing The Gateway dial plan supports the following direct dialing and call routing facilities:
 Direct Inward Dialing (DID)
 Multiple Subscriber Network (MSN)
 Q.931 Sub-addressing Information Element
Gateway S40 SP supports DID in DCE mode only.
 Internal and External Interactive Voice Response (IVR)
 TCS4
 Default extension
Access control The Gateway features password-controlled access to the Gateway interface. Up to ten
different administrator access profiles can be defined for the Gateway.
DTMF translation The Gateway supports translation between in-band Dual Tone Multi-Frequency (DTMF)
signals (on the ISDN side) and out-of-band H.245 messages (on the IP side). DTMF
translation occurs for voice and video calls.
Dual video The Gateway supports H.239 standard-based dual video and TANDBERG DuoVideo™
technology. Dual video streams enable a screen to carry video images from one source while
simultaneously displaying images from a second source.
Hot swap The Gateway features hot swap functionality that you can use to remove and replace
Gateway blades under power.
Conceal caller ID The Gateway supports a conceal caller ID feature that instructs the gatekeeper to conceal the
identity of the calling endpoint on the IP or ISDN network, whether the presentation
restricted feature is enabled or not.
H.323 fast start The Gateway H.323 fast start feature enables endpoints to join a voice conference in the
Gateway more quickly.
ISDN rollover (available in
Gateway P20 SP only)
The Gateway features ISDN rollover. In this feature, the Gateway sends a “busy out”
channel request to the PSTN switch when the current PRI connection is left with less than a
predefined number of available B channels. The PSTN switch “rolls over” to the next
available gateway.
Network Specific Facility
(available in Gateway P20 SP
only)
The Gateway provides support for Network Specific Facility Information Elements (NSF
IEs) which enable system administrators to specify to service providers the equipment,
service, or network through which they want a call routed.
Table 1-1 Gateway Feature Summary (continued)
Feature Description