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			Informasjon
			
- Basic T1/E1 data
 - E1/G.703 data
 - T1/E1 packet voice
 - Mixed data and packet voice
 - Mixed data and packet voice with drop and insert
 
The T1/E1 modules contain an onboard Cisco Packet Voice Digital Signal Processor Module 4 (PVDM4) slot, which requires a fourth-generation PVDM4 module. A PVDM4 on the T1/E1 module is necessary for the voice features. The PVDM4 also provides for echo cancellation of up to 128-ms echo-tail length for demanding network conditions.
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			Spesifikasjon
			
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