TANDBERG Hub - Manual (Page 11)

TANDBERG 3G Gateway User Manual
Blue Alarm indicates that the received frames are not synchronized properly.
No LED’s light up, indicates that layer one framing is working (right protocol like for example
EURO ISDN selected), however there is a problem at layer 2 caused by for example a CRC4
configuration mismatch.
1.1.1 3G GATEWAY Capacity – typical scenarios
Due to the fixed bandwidth of UMTS video telephony every call will be limited to 64 Kbit. This
offers a capacity of 30 simultaneous calls through a single PRI 3G Gateway or 8 calls through a 4
x BRI 3G Gateway. Due to audio transcoding (AMR to G.711) the bandwidth at IP side is 109
Kbit/s per session, 64 Kbit G.711 audio and 45 Kbit H.263 video. Depending on the option
package and version of the 3G Gateway (PRI or BRI) the amount of simultaneous 3G calls can
be less then 30 or 23 for T1.
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