<tr bgcolor="#E# | Model # | Description | Availability | 1 | SN4991/1E15V2G/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 15 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 2 | SN4991/1E15V2GS/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 15 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 3 | SN4991/1E15V4G/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 15 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 4 | SN4991/1E15VA/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, ADSL, 2x GigEthernet, 15 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 5 | SN4991/1E15VD/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 15 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 6 | SN4991/1E15VF/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 15 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 7 | SN4991/1E24V2G/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 24 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 8 | SN4991/1E24V2GS/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 24 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 9 | SN4991/1E24V4G/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 24 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 10 | SN4991/1E24VD/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 24 VoIP channels, upgradeable to 30; upgradeable to 30, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 11 | SN4991/1E24VF/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 24 VoIP channels, upgradeable to 30; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 12 | SN4991/1E30V2G/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 30 VoIP channels, nonupgradeable; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 13 | SN4991/1E30V2GS/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 30 VoIP channels, nonupgradeable; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 14 | SN4991/1E30V4G/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 30 VoIP channels, nonupgradeable; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 15 | SN4991/1E30VA/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, ADSL, 2x GigEthernet, 30 VoIP channels; not upgradeable , External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 16 | SN4991/1E30VD/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 30 VoIP channels; External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 17 | SN4991/1E30VF/EUI | SmartNode 1 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 30 VoIP channels; nonupgradeable, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 18 | SN4991/4E120VR2G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 120 VoIP channels; Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 19 | SN4991/4E120VR2GS/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 120 VoIP channels; not upgradeable , Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 20 | SN4991/4E120VR4G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 120 VoIP channels; Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 21 | SN4991/4E120VRD/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 120 VoIP channels; not upgradeable , Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 22 | SN4991/4E120VRF/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 120 VoIP channels; nonupgradeable, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 23 | SN4991/4E15VR2G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 15 VoIP channels; Upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 24 | SN4991/4E15VR2GS/EUI | SmartNode 4 T1/E1 PRI VoIP IAD,G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 15 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 25 | SN4991/4E15VR4G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 15 VoIP channels; Upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 26 | SN4991/4E15VRA/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, ADSL, 2x GigEthernet, 15 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 27 | SN4991/4E15VRD/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 15 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 28 | SN4991/4E15VRF/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 15 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 29 | SN4991/4E24VR2G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 24 VoIP channels; Upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 30 | SN4991/4E24VR2GS/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 24 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 31 | SN4991/4E24VR4G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 24 VoIP channels; Upgraeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 32 | SN4991/4E24VRD/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 24 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 33 | SN4991/4E24VRF/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 24 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 34 | SN4991/4E30V120R2G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 30 VoIP channels; upgradeable to 120, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 35 | SN4991/4E30V120R2GS/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 30 VoIP channels; upgradeable to 120, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 36 | SN4991/4E30V120R4G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 30 VoIP channels; upgradeable to 120, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 37 | SN4991/4E30V120RD/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 30 VoIP channels; upgradeable to 120, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 38 | SN4991/4E30V120RF/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, Fiber SFP, 2x GigEthernet, 30 VoIP channels; upgradeable to 120, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 39 | SN4991/4E30VR2G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 30 VoIP channels; Upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 40 | SN4991/4E30VR2GS/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 30 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 41 | SN4991/4E30VR4G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 30 VoIP channels; Upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 42 | SN4991/4E30VRA/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, ADSL, 2x GigEthernet, 30 VoIP channels; Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 43 | SN4991/4E30VRD/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 30 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 44 | SN4991/4E30VRF/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 30 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 45 | SN4991/4E48VR2G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 48 VoIP channels; Upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 46 | SN4991/4E48VR2GS/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 48 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 47 | SN4991/4E48VR4G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 48 VoIP channels; Upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 48 | SN4991/4E48VRD/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 48 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 49 | SN4991/4E48VRF/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 48 VoIP channels; upgradeable to 60, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 50 | SN4991/4E60VR2G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 60 VoIP channels; nonupgradeable, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 51 | SN4991/4E60VR2GS/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-ATM (4-Wire), 2x GigEthernet, 60 VoIP channels; not upgradeable , Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 52 | SN4991/4E60VR4G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (8-Wire), 2x GigEthernet, 60 VoIP channels; Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 53 | SN4991/4E60VRD/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 60 VoIP channels; not upgradeable , Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 54 | SN4991/4E60VRF/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, SFP, 2x GigEthernet, 60 VoIP channels; nonupgradeable, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 55 | SN4991/4E96VR2G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL.bis-EFM (4-Wire), 2x GigEthernet, 96 VoIP channels; Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 56 | SN4991/4E96VR2GS/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, G.SHDSL, 2x GigEthernet, 96 VoIP channels; upgradeable to 120, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 57 | SN4991/4E96VR4G/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, EFM (8-Wire), 2x GigEthernet, 96 VoIP channels; Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability | | Accessories |
| 58 | SN4991/4E96VRD/EUI | SmartNode 4 T1/E1 PRI VoIP IAD, X.21, 2x GigEthernet, 96 VoIP channels; upgradeable to 120, Failover Relay, External UI Power, IPv6 ready, High Precision 5ppm Clock Source | General Availability |
|