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VIP-2100 User’s manual - 55 -
voice quality. Set to 12 will have long voice delay but with better voice
quality
• EC Tail Length: Echo Cancellation Length, default value is 25ms
• Silence Compress: Enable silence compress or not
• TDM Bus Clock: TDM Bus clock source
o Internal: derived from internal oscillator
o External: derived from external PSTN E1/T1 clock
Dial Plan Configuration
Dial Plan can be used to assign the ISDN number plan based on prefix
setting.
Start Path: Configuration→Interface→Dial Plan
Figure 7.3-1
Basic Parameter Description:
• Prefix: Called party number prefix
• Src Num Plan: ISDN Source number plan
• Src Num Type: ISDN Source number type
• Dest Num Plan: ISDN destination number plan
• Dest Num Type: ISDN destination number type
• ApplyTo: Trunks apply to
T1/E1 Trunk Configuration
Start Path: Configuration→Interface→Trunk