Nortel Networks 9150 - Manual (Page 97)

Remote Gateway 9150 Installation and Administration Guide 67
January 2005 Planning for Remote Gateway 9150 unit installation
Voice compression
If calls are to be routed over the IP network, you must select one of the
following voice compression algorithms on each RLC port:
!
G.711: Voice is transmitted at 64 Kbps (no compression).
!
G.726: Voice is compressed and transmitted at 32 Kbps.
!
G.729A: Voice is compressed and transmitted at 8 Kbps.
G.729A is the default voice compression algorithm used by the RLC. This
allows
— up to six simultaneous voice calls to be processed over the first ISDN
BRI B-channel (16 Kbps are reserved for signaling data)
— up to eight simultaneous voice calls to be processed over the remaining
ISDN BRI B-channels
Each Remote Gateway 9150 station inherits its compression algorithm from its
assigned RLC port.
Station priority
You can configure each RLC port that is assigned to each station as normal
priority, high priority, PSTN only, or IP only.
When the port is configured as high priority and the priority reserved setting is
configured on the connection between the RLC and Remote Gateway 9150 unit,
you can ensure voice QoS for calls to and from those stations.
For more details, refer to “Station priority” on page 36 and “Connection
bandwidth” on page 37.
Notes:
1. Each Remote Gateway 9150 station inherits its priority setting from its
assigned RLC port.
2. The number of RLC ports that you can configure as high priority depends
on the amount of available bandwidth. The RLC administrator must ensure
that enough bandwidth is available to process calls on normal priority ports.