Qos Transition - Nortel Remote Gateway 9110 Installation And Administration Manual

June 2005
Model 4: PSTN on-demand
If either toll charges or B-channel usage at the host PBX is an issue, configure a
PSTN on-demand connection. This deployment option provides the best
economy.
12-20 second connect time for new calls if PSTN link is down
PSTN link closes after PBX calls complete
configure the PSTN # of the Remote Gateway 911x series unit on the RLC
does not support call waiting even if cancel call waiting is entered on the
Remote Gateway 911x series unit

QoS transition

Deploy your Remote Gateway 911x series unit with a QoS transition connection
to take advantage of the best of both worlds. The IP network is the preferred
medium. However, sometimes the voice QoS on the IP network can deteriorate.
When this happens, the RLC maintains acceptable voice QoS for QoS transition
connections. The RLC does this by transitioning calls to the more stable PSTN
network until QoS on the IP network returns to acceptable levels.
For information on configuring QoS Transition Technology, refer to the Reach
Line Card Installation and Administration Guide (NTP 555-8421-210).
The following are characteristics of QoS Transitioning Technology:
QoS drops below 12-20 second transition time during which call stays on
the IP with IP QoS
voice traffic returns to IP when QoS returns to within acceptable limits
voice call ends and QoS is still bad, the PSTN link remains up
Remote Gateway 9100 Series units only test IP QoS during active voice
calls
does not support call waiting even if cancel call waiting is entered at the
Remote Gateway 911x series unit
Model 5: IP Permanent, PSTN Permanent
Configure PSTN Permanent to keep the PSTN link up while IP QoS is bad (Best
service).
Remote Gateway 911x Series Installation and Administration Guide
Planning for installation
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