I agree with Telair. I've also been able to implement ADAC and LLDP-MED on my network using ERS 4500's, but I didn't have to promise any souls to dark gods... LOL!!
If you like I can post some configuration examples for you to look at. It works very well - separate voice and data VLANs, no voice VLAN exposure etc. I even have ERS 2500's providing DHCP for the phones while the PCs get their IPs from a typical Microsoft DHCP server.
OK. I might as well post some of the config.

#vlan create 330 name DATA type port
#vlan create 340 name VOICE type port 1 voice-vlan
Enable 802.1Q tagging on all fibre uplinks and enable the filtering of untagged frames.
#vlan ports 25,26 tagging tagall filter-untagged-frame enable
Configure access ports 1-24 {1-48} to allow untagged data VLAN 330 and tagged voice VLAN 340
#vlan port 1-24{1-48} tagging untagpvidonly
#vlan members add 330 1-23,25,26
#vlan port 1-23{1-47} pvid 330
Note, in case you're wondering, port 24 was not added to the DATA VLAN because it was assigned to the management VLAN - not shown in this config example.
Enable spanning tree fast learning on all ports.
#interf fa 1-26
#spanning-tree learning fast
It is recommended to also enable BPDU filtering on all access ports.
#interf fa 1-24{1-48}
#spanning-tree bpdu-filtering enable
#exit
Now for the ADAC/LLDP-MED configuration.
#vlan ports 1-23{1-47} filter-unregistered-frames disable
#adac voice-vlan 340
#adac uplink-port 25,26
#adac op-mode tagged-frames
#adac traps enable
#adac enable
#interf fa 1-23{1-47}
#adac tagged-frames-tagging untag-pvid-only
#adac enable
#lldp tx-tlv port 1-23 {1-47} local-mgmt-addr port-desc sys-desc sys-name
#lldp status txandrx config-notification
#lldp tx-tlv med extendedPSE med-capabilities network-policy
#lldp med-network-policies voice dscp 46 priority 6 tagging tagged vlan-id 340
#exit
Most of this is default in the latest version of the code I believe.
QoS configuration. In this case we only have to change the default QoS queue set to 4 and reboot. ADAC/LLDP takes care of the rest.
#qos agent queue-set 4
#save config
#boot
I hope this helps.
Avaya - "The power of We".