Chapter 71 Product Specifications
IES-1248-51V User’s Guide
582
71.2 VoIP Features
This section lists the IES-1248-51V’s additional VoIP features.
Table 231 VoIP Features
Media Gateway
Signaling Protocols
ITU-T H.248 version 2
SDP (RFC 2327)
Support up to two media gateway controllers
Media Gateway
Protocols
IP/UDP/RTP encapsulation for IPV4
RTP (RFC 1889)
RTCP (RFC 1890)
Session Timer Protocol (RFC 4028)
DTMF detection and generation (bi-directional)
In-Band and Out-of-Band (RFC 2833)
FAX/Modem pass through (T.38 via RTP) or transparent (G.711)
Supplementary
Features
Caller ID display enabled and disabled
Do not disturb within a specified time period
Call waiting
Call hold
Call transfer (blind and consultative)
Call transfer while busy
Call return and call back when busy
Incoming call filtering
Outgoing call filtering
Three-way calling
Loop diagnostics • Metallic Loop Test (MLT) for subscriber lines:
Foreign AC/DC voltage test
Three-element capacitance test
Three-element resistance test
Ringing equivalency number test (REN measurement)
Loop resistance test
Ring voltage test
Metering voltage test
• GR-909 loop diagnostics
• Configurable loop impedance
•Test in/out ports.
To Next Page
Loading...