Zhone 2000 ユーザーズマニュアル

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Type V to select the type of dial tone heard by the telephone user if there 
is insufficient WAN bandwidth to complete a call. The IAD displays the 
Insufficient Bandwidth Indication Setting menu and the current setting:

Type 0 to replace the dial tone with silence, or type 1 to replace dial tone 
with a fast beeping sound.

Press Escape to return to the Call Control Setting menu and continue 
configuration.

Type Z to reset the JetStream statistics. The IAD resets the statistics to 
zero and displays the Call Control Setting menu.

ATM Adaptation Layer 2/Loop Emulation Services (AAL2/LES) is a 
broadband local loop emulation service (specifically telephony) that uses 
the ATM AAL2 adaptation layer.

When the voice gateway is specified as AAL2/LES CAS (af-vmoa-0145), 
type E on the Main menu to display the AAL2/LES Call Control menu:

Type the option for the command to execute and proceed to the 
appropriate section.

Type C to display the AAL2/LES Configuration menu:

***** Insufficient Bandwidth Indication Setting *****

Current sound setting = Silence

0. Play Silence
1. Play Fast Beeping

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AAL2/LES Call Control

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C. Configuration
D. Debugging
S. Statistics