Adtran Netvanta 3200

My company has a customer who has a point-to-point leased line ( a T1) between their two offices. In each office we have installed an NEC Aspire phone system. These systems aer capable of doing VoIP for station to station transfer betwee nthe two locations. This solution has been done many times before successfuly. The router that terminate the T1 at each end are the Adtran Netvata 3200 series routers.


NetVanta 3200


Modular Access Router - Single Slot/Single Ethernet
The NetVanta 3200 is an access router designed for cost-effective Internet access, corporate Frame Relay, point-to-point connectivity, and Virtual Private Networking (VPN) for applications requiring bandwidth from 56k to dual-T1s. Residing in a standalone desktop chassis with a plastics enclosure, the NetVanta 3200 is a single platform that offers one interface slot and one 10/100Base-T Ethernet LAN port. The modular NetVanta 3200 will house a variety of Network Interface Modules (NIMs) and includes a Stateful Inspection Firewall, QoS for delay sensitive traffic like VoIP, NAT and DHCP, and all managed with a familiar Command Line Interface (CLI).

The command line of the router is familiar. It has the look and feel of cisco routers. This makes using the CLI easy and comfortable for anyone familiar with configuring cisco router.


Adtran in my opinion makes some of the best most reliable equipment. Their support is top notch and never let you down. I've only had a problem with their tech support when they have been backed up. Besides this ocurring once or twice their technical support staff is top notch.

The NEC communicate with each other over the point-to-point T1 just fine. but when a download is initiated from iether side to the other, the voice is terrible. After upgrading the operating systems on both adtrans, which I have to say was a breeze, I had more quality of service tools at my disposal. After trying various methods to smooth the voice quality there was no fixing it. The reason I found that the quality of the VoIP is so bad is providers line is bad. In particular, it seems it's the tranmitt pairs at one of the locations. This will be a long drawn out fight with the service provider for sure. They have tried to blame the custoemr premiss equipment but I'm steadfastly standing behind the Netvanta router.