here's some more snippets from this call, taken from tethereal output. unfortunately, this doesn't include sequence numbers: 16287348 553.965822 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20ms NEW 16287353 553.966295 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 11ms ACCEPT 16287381 553.988555 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 11ms ACK 16287414 553.999814 69.16.46.115 -> 208.185.32.229 IAX2 Text, source call# 3, timestamp 14ms subclass 0 16287423 554.004419 208.185.32.229 -> 69.16.46.115 IAX2 Voice, source call# 3, timestamp 60ms, Raw mu-law data (G.711) 16287424 554.004464 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 60ms ACK 16287441 554.014899 69.16.46.115 -> 208.185.32.229 IAX2 Control, source call# 3, timestamp 17ms ANSWER 16287442 554.015442 69.16.46.115 -> 208.185.32.229 IAX2 Voice, source call# 3, timestamp 60ms, Raw mu-law data (G.711) 16287445 554.021909 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 14ms ACK 16287448 554.024407 208.185.32.229 -> 69.16.46.115 IAX2 Mini packet, source call# 3, timestamp 80ms, Raw mu-law data (G.711) 16287482 554.035997 69.16.46.115 -> 208.185.32.229 IAX2 Mini packet, source call# 3, timestamp 80ms, Raw mu-law data (G.711) 16287483 554.036650 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 17ms ACK 16287490 554.037274 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 60ms ACK (more minipackets).. 16305390 563.965846 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 10021ms LAGRQ 16305391 563.965872 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 10001ms LAGRQ 16305392 563.965911 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 10021ms LAGRP 16305413 563.984710 208.185.32.229 -> 69.16.46.115 IAX2 Mini packet, source call# 3, timestamp 10040ms, Raw mu-law data (G.711) 16305416 563.986284 69.16.46.115 -> 208.185.32.229 IAX2 Mini packet, source call# 3, timestamp 10015ms, Raw mu-law data (G.711) 16305422 563.987833 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 10001ms LAGRP 16305423 563.987842 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 10021ms ACK 16305424 563.987877 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 10001ms ACK (more minipackets).. 16323433 573.964126 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20019ms PING 16323434 573.964136 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20022ms LAGRQ 16323435 573.964188 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20019ms PONG 16323436 573.964255 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20022ms LAGRP 16323437 573.964278 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20000ms LAGRQ 16323438 573.964500 208.185.32.229 -> 69.16.46.115 IAX2 Mini packet, source call# 3, timestamp 20020ms, Raw mu-law data (G.711) 16323441 573.966540 69.16.46.115 -> 208.185.32.229 IAX2 Mini packet, source call# 3, timestamp 19995ms, Raw mu-law data (G.711) 16323442 573.968275 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20002ms PING 16323467 573.984489 208.185.32.229 -> 69.16.46.115 IAX2 Mini packet, source call# 3, timestamp 20040ms, Raw mu-law data (G.711) 16323468 573.986113 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20041ms VNAK 16323469 573.986122 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20019ms ACK 16323470 573.986131 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20047ms VNAK 16323471 573.986145 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323472 573.986156 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323473 573.986168 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20019ms PONG 16323474 573.986177 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20022ms LAGRP 16323475 573.986187 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20000ms LAGRQ 16323476 573.986197 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20002ms PING 16323477 573.986236 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323478 573.986249 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323479 573.986261 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20022ms LAGRP 16323480 573.986276 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20000ms LAGRQ 16323481 573.986288 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20002ms PING 16323486 573.986543 69.16.46.115 -> 208.185.32.229 IAX2 Mini packet, source call# 3, timestamp 20015ms, Raw mu-law data (G.711) 16323491 573.990362 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20050ms VNAK 16323492 573.990398 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323493 573.990409 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323494 573.990417 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20022ms LAGRP 16323495 573.990425 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20000ms LAGRQ 16323496 573.990433 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20002ms PING 16323531 574.004602 208.185.32.229 -> 69.16.46.115 IAX2 Mini packet, source call# 3, timestamp 20060ms, Raw mu-law data (G.711) 16323532 574.005463 69.16.46.115 -> 208.185.32.229 IAX2 Mini packet, source call# 3, timestamp 20035ms, Raw mu-law data (G.711) 16323533 574.007973 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20063ms VNAK 16323534 574.007983 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20019ms ACK 16323535 574.007990 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20022ms ACK 16323536 574.007996 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20066ms VNAK 16323537 574.008001 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20000ms LAGRP 16323538 574.008034 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323539 574.008046 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323540 574.008059 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20022ms LAGRP 16323541 574.008070 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20000ms LAGRQ 16323542 574.008082 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20002ms PING 16323543 574.008135 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323544 574.008143 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP Interesting at this point, that the responses coming from umass to ast2 at this point have nonsensical timestamps. Everything up to this point should be around 20s, but once umass gets the VNAK, is starts sending LAGRQ with a timestamp of 1699997ms, and LAGRP with a timestamp of 8400027ms.. 16323545 574.008150 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20022ms LAGRP 16323546 574.008157 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20000ms LAGRQ 16323547 574.008164 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20002ms PING 16323548 574.008187 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20000ms ACK 16323549 574.008348 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20002ms PONG 16323550 574.008358 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20072ms VNAK 16323551 574.008364 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20075ms VNAK 16323552 574.008370 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20022ms ACK 16323553 574.008376 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20000ms ACK 16323554 574.008381 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20002ms ACK 16323555 574.008415 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 20002ms ACK 16323556 574.008449 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323557 574.008460 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323558 574.008484 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323559 574.008495 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323564 574.012348 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20078ms VNAK 16323565 574.012358 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20022ms ACK 16323566 574.012366 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20081ms VNAK 16323567 574.012392 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323568 574.012403 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323569 574.012429 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323570 574.012438 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323571 574.012482 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20000ms ACK 16323572 574.012492 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20002ms ACK 16323598 574.024340 208.185.32.229 -> 69.16.46.115 IAX2 Mini packet, source call# 3, timestamp 20080ms, Raw mu-law data (G.711) 16323601 574.025456 69.16.46.115 -> 208.185.32.229 IAX2 Mini packet, source call# 3, timestamp 20055ms, Raw mu-law data (G.711) 16323605 574.029960 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20085ms VNAK 16323606 574.029993 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323607 574.030005 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323608 574.030088 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20002ms ACK 16323609 574.030097 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20088ms VNAK 16323610 574.030103 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20000ms ACK 16323611 574.030109 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20091ms VNAK 16323612 574.030114 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20022ms ACK 16323613 574.030119 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20022ms ACK 16323614 574.030125 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20094ms VNAK 16323615 574.030164 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323616 574.030176 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323617 574.030232 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323618 574.030243 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323619 574.030303 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323620 574.030311 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323621 574.030459 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20000ms ACK 16323622 574.030469 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20002ms ACK 16323623 574.030474 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20097ms VNAK 16323624 574.030480 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20100ms VNAK 16323625 574.030486 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20103ms VNAK 16323626 574.030492 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20106ms VNAK 16323627 574.030532 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323628 574.030542 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323629 574.030581 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323630 574.030595 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323631 574.030619 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323632 574.030630 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323633 574.030657 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 1699997ms LAGRQ 16323634 574.030668 69.16.46.115 -> 208.185.32.229 IAX2 IAX, source call# 3, timestamp 840027ms LAGRP 16323649 574.034462 208.185.32.229 -> 69.16.46.115 IAX2 IAX, source call# 3, timestamp 20109ms VNAK And that continues..