a Determine for UA A

$$ Permanent SIP$-$URI:

$$ Temporary SIP$-$URI:

$$ IP$-$address of the responsible Proxy $1$:

b Determine for UA B

$$ Permanent SIP$-$URI:

$$ Temporary SIP$-$URI:

$$ IP$-$address of the responsible Proxy $3$:

c Which audio codecs does UA A offer?

d What type of payload type number is used here?

e Which audio codec is used here?

f How many samples are transmitted per RTP packet?

g How many ms of voice are transmitted per RTP packet?

h How many voice data Byte are transferred per RTP packet with minimal IPv$4$ header?