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New Member

G.HDSL QOS LLQ for Voice

Hello All,

We are pushing IP phones out to our branch offices.

We have a 3662 that connects to the PSTN via a PRI.

All of Remote office voice traffic routes out to the PSTN via the 3662 PRI connection.

We are using a 3640 as our DSL shelf plugged with G.shdsl cards. The 3640 uplinks to our 3662 via a FE port.

3 3>>>(G.SHDSL)>>>2621


6 4>>>(G.SHDSL)>>>2621

2 0>>>(G.SHDSL)>>>2621

Each remote office has a 2621 and a 3524 switch.

Sample ATM/Dialer Config:


interface ATM0/0

no ip address

no atm ilmi-keepalive

pvc 0/35

encapsulation aal5snap


pvc 8/35

encapsulation aal5mux ppp dialer

dialer pool-member 1


pvc 10/100

vbr-rt 672 672 512

encapsulation aal2



dsl equipment-type CPE

dsl operating-mode GSHDSL symmetric annex A

dsl linerate AUTO



interface Dialer1

ip address

encapsulation ppp

dialer pool 1

dialer-group 1


Everything routes.In the testing phase everything worked flawlessly. Voice/Video and Data all route correctly. We installed more phones at the remote sites and ran into Voice Quality issues.

I am a newbie to the G.SHDSL card. Has anyone deployed this with LLQ and QOS via a policy map.

Does the QOS go on the ATM or Dialer?

Is it similar to Serial and Multilink interfaces?

If anyone has hands on experence please give us some assistance.



New Member

Re: G.HDSL QOS LLQ for Voice

Your policy map in theory could go in one of two places. It can go on an individual PVC (other PVC's however could "out-traffic" this PVC).

I'd recommend setting it on the dialer interface so the whole interface can be QoS controlled and one PVC's traffic can't kill your voice quality.

I've never had to do this specific dialer arrangement, but based on ATM experience, using the dialer-interface should work.