How many channels are required for one G711 Call on T1 PRI

Hi Everyone,
Just have a basic question.
Lets say i want to make one G711 call which is compressed. below will be the bandwidth required.
Calculation:
Total packet size (bytes) = (Layer 2 Ethernet header 6 bytes) + ( compressed IP/UDP/RTP header of 2 bytes) + (voice payload of 20 bytes) = 28 bytes. Total packet size (bits) = (28 bytes) * 8 bits per byte = 224 bits
PPS = (64 Kbps codec bit rate) / (160 bits) = 409 pps
Bandwidth per call = voice packet size (224 bits) * 409 pps = 90 Kbps
From what i know, 1 channel on a T1 has a bandwidth of 64kbps.
Question:
Does this call require two channels to start the conversation?
Will this call be successful?
How will one channel accommodate this call?

No, 64 kbps basically matches the payload, and the TDM T1 trunk needs no IP header overhead, so it matches, even if it did not you are trying to compare apples and oranges as when you send the call to channelized T1 circuit it's TDM based (bandwidth is irrelevant), if by T1 you meant data T1 then the circuit would not be channelized and would provide total 1.544 mbps.
Chris

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