Really slow during phone call

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Posts: 9
Joined: Sun Jan 17, 2010 6:12 am

Really slow during phone call

Post by dullgeek » Fri Sep 24, 2010 5:18 am

I've discovered a new problem. Previously I had posted a question about really long ping times. This problem is different than that problem in that this one is repeatable.

Here's my setup:

cable modem <-> ooma <-> router <-> server (connected via cat5e)

I am pinging google from my server. And here's what happens to my ping times whenever I make a phone call. Is there any way to prevent the phone call from completely dominating all internet bandwidth? I don't mind it having priority but I've got plenty of bandwidth available. It shouldn't downgrade the rest so dramatically.

$ ping
PING ( 56(84) bytes of data.
64 bytes from ( icmp_seq=1 ttl=52 time=98.6 ms
64 bytes from ( icmp_seq=2 ttl=52 time=97.3 ms
64 bytes from ( icmp_seq=3 ttl=52 time=99.5 ms
64 bytes from ( icmp_seq=4 ttl=52 time=95.7 ms
64 bytes from ( icmp_seq=5 ttl=52 time=94.4 ms

Pick up phone. Dial tone. Dial Number

64 bytes from ( icmp_seq=6 ttl=52 time=508 ms
64 bytes from ( icmp_seq=7 ttl=52 time=559 ms
64 bytes from ( icmp_seq=8 ttl=52 time=693 ms
64 bytes from ( icmp_seq=9 ttl=52 time=731 ms
64 bytes from ( icmp_seq=10 ttl=52 time=768 ms
64 bytes from ( icmp_seq=11 ttl=52 time=863 ms
64 bytes from ( icmp_seq=12 ttl=52 time=1098 ms
64 bytes from ( icmp_seq=13 ttl=52 time=985 ms
64 bytes from ( icmp_seq=14 ttl=52 time=830 ms
64 bytes from ( icmp_seq=15 ttl=52 time=339 ms
64 bytes from ( icmp_seq=16 ttl=52 time=490 ms
64 bytes from ( icmp_seq=17 ttl=52 time=825 ms


64 bytes from ( icmp_seq=18 ttl=52 time=789 ms
64 bytes from ( icmp_seq=19 ttl=52 time=1035 ms
64 bytes from ( icmp_seq=20 ttl=52 time=1436 ms

Pause between ring

64 bytes from ( icmp_seq=21 ttl=52 time=1169 ms
64 bytes from ( icmp_seq=22 ttl=52 time=519 ms
64 bytes from ( icmp_seq=23 ttl=52 time=457 ms


64 bytes from ( icmp_seq=24 ttl=52 time=1098 ms
64 bytes from ( icmp_seq=25 ttl=52 time=1616 ms
64 bytes from ( icmp_seq=26 ttl=52 time=1329 ms

Pause between ring

64 bytes from ( icmp_seq=28 ttl=52 time=1336 ms
64 bytes from ( icmp_seq=29 ttl=52 time=992 ms
64 bytes from ( icmp_seq=30 ttl=52 time=671 ms
64 bytes from ( icmp_seq=31 ttl=52 time=409 ms


64 bytes from ( icmp_seq=32 ttl=52 time=2381 ms
64 bytes from ( icmp_seq=33 ttl=52 time=1440 ms

Pause between ring

64 bytes from ( icmp_seq=34 ttl=52 time=560 ms
64 bytes from ( icmp_seq=35 ttl=52 time=574 ms
64 bytes from ( icmp_seq=36 ttl=52 time=959 ms

Answer. Listen to answering machine talk

64 bytes from ( icmp_seq=37 ttl=52 time=1140 ms
64 bytes from ( icmp_seq=38 ttl=52 time=1231 ms
64 bytes from ( icmp_seq=39 ttl=52 time=1711 ms
64 bytes from ( icmp_seq=40 ttl=52 time=1465 ms
64 bytes from ( icmp_seq=41 ttl=52 time=1685 ms
64 bytes from ( icmp_seq=42 ttl=52 time=1565 ms
64 bytes from ( icmp_seq=43 ttl=52 time=860 ms
64 bytes from ( icmp_seq=44 ttl=52 time=924 ms
64 bytes from ( icmp_seq=45 ttl=52 time=1424 ms
64 bytes from ( icmp_seq=46 ttl=52 time=1517 ms
64 bytes from ( icmp_seq=47 ttl=52 time=1623 ms

Hang up

64 bytes from ( icmp_seq=48 ttl=52 time=963 ms
64 bytes from ( icmp_seq=49 ttl=52 time=557 ms
64 bytes from ( icmp_seq=50 ttl=52 time=238 ms
64 bytes from ( icmp_seq=51 ttl=52 time=93.4 ms
64 bytes from ( icmp_seq=52 ttl=52 time=94.8 ms
64 bytes from ( icmp_seq=53 ttl=52 time=97.1 ms
64 bytes from ( icmp_seq=54 ttl=52 time=91.4 ms
--- ping statistics ---
54 packets transmitted, 53 received, 1% packet loss, time 53157ms
rtt min/avg/max/mdev = 91.474/853.708/2381.901/535.974 ms, pipe 3

Posts: 7240
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Re: Really slow during phone call

Post by murphy » Fri Sep 24, 2010 6:13 am

If you have "plenty of bandwith", disable the QOS function in Ooma (set both values to 0) and rerun your test.
Customer since January 2009
Telo with 2 Handsets, a Linx, and a Safety Phone
Telo2 with 2 Handsets and a Linx

Posts: 9
Joined: Sun Jan 17, 2010 6:12 am

Re: Really slow during phone call

Post by dullgeek » Fri Sep 24, 2010 7:45 am

But I want the QoS. I just don't think the QoS reserving a small amount of bandwidth should cause this much latency in all other traffic.

My solution was to swap the positions of ooma and the router, and use the router's QoS features. I'm running a WRT54G w/Tomato+Victec firmware. It's QoS seems to be pretty decent.

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