What is the current available cash revolver balance of Ceragon Networks? 
n 18 months type of period, at least on products out there.
But I think that the story there is part of the continuous innovation we are doing just with the different products that we have on the table in really creating the demand and keeping our leadership position in the market versus all the competitors. Again, I think we discussed last time when we were on the call that we're disruptive. We have done again and again the disruptions in the market and also putting it on the table. Even our current product set, the IP-50E I mentioned on the call and IP-50C, are disruptive in the market and enable capabilities no one else has.
Like the 20 gigabit and the 50E product or the very wide channels we have in the 50C, all of those are required today for 5G. And that's what's building the 5G design wins and the things that we are doing. Here, the chipset is built for the next step out there, again disrupting because let's remember, 5G is not a onetime event. It's probably over the next six or seven years as we move forward.
And that's where the next SoC comes in with 40, 50, 100 gigabits in the year and capabilities when we see things coming in on the table and doing the disruption again. And it's a continuum that will drive the company. And going back to your questions, you're 100% right because the operators are looking for someone who'll do the long-term ride with them. It's yesterday, we rode with them.
New ones, we are -- they are on with us. They want the best technology, best of breed today, but they want to make sure that, that best of breed stays with them for our next step as well. So that's where the whole story sits on the table. And this guy here needs to make this reality in the delivery, right? Yes?
George Iwanyc -- Oppenheimer & Co. Inc. -- Analyst
Well, with that, thank you very much, Ira. And again, Doron, congratulations.
Doron Arazi -- Chief Executive Officer
Thank you very much. Thanks.
Ira Palti -- President and Chief Executive Officer
Thanks, George.
Operator
[Audio gap]
Unknown speaker
Hi. Can you hear me? Hi.
Ira Palti -- President and Chief Executive Officer
Hi, Lance.
Unknown speaker
Congratulations on the quarter. It seems like you guys are executing really well in a challenging environment. And by the way, thank you for doing this call on Zoom. I think this is so much easier than doing the dial in and then waiting for the operator and everything.
So kudos on that. My question is actually just on the balance sheet. I saw that cash increased a little bit despite the fact that you guys are burning a little cash. So presumably, you have some sources of liquidity but $33 million of cash doesn't sound like a lot of money to me.
And so I'm just wondering if you could speak to your additional sources of liquidity. Is Ceragon adequately capitalized given what I think we all agree is a pretty meaningful opportunity here at the advent of 5G?
Ran Vered -- Chief Financial Officer
Hi, Lance. Thanks [Inaudible] So just also to comment on the Zoom call, it's not only Zoom call. All the call was done by 5G handset on 5G network. So this is really exciting -- so just to begin with, so yes, we have $33 million cash available but we also have almost $40 million of available cash revolver that we can utilize for anything that we would like to.
The banks are really -- just a reminder, we had $40 million of credit with the banks, which we increased during the corona crisis last June to $50 million, and we utilized just $11 million out of it. It's more than enough for working capital needs. You can see that we also improved working capital for the last year pretty dramatically. We reduced our inventory levels.
We improved our R&D. So we reduced some of the payables. So I think that the balance sheet and the working capital is pretty strong, and we have the sufficient liquidity to operate.
Unknown speaker
Great, guys. Thanks and congratulations again.
Ran Vered -- Chief Financial Officer
Thanks, Lance.
Ira Palti -- President and Chief Executive Officer
Thanks, Lance.
Operator
Our next question is from the line of Alex Hende
n 18 months type of period, at least on products out there.
But I think that the story there is part of the continuous innovation we are doing just with the different products that we have on the table in really creating the demand and keeping our leadership position in the market versus all the competitors. Again, I think we discussed last time when we were on the call that we're disruptive. We have done again and again the disruptions in the market and also putting it on the table. Even our current product set, the IP-50E I mentioned on the call and IP-50C, are disruptive in the market and enable capabilities no one else has.
Like the 20 gigabit and the 50E product or the very wide channels we have in the 50C, all of those are required today for 5G. And that's what's building the 5G design wins and the things that we are doing. Here, the chipset is built for the next step out there, again disrupting because let's remember, 5G is not a onetime event. It's probably over the next six or seven years as we move forward.
And that's where the next SoC comes in with 40, 50, 100 gigabits in the year and capabilities when we see things coming in on the table and doing the disruption again. And it's a continuum that will drive the company. And going back to your questions, you're 100% right because the operators are looking for someone who'll do the long-term ride with them. It's yesterday, we rode with them.
New ones, we are -- they are on with us. They want the best technology, best of breed today, but they want to make sure that, that best of breed stays with them for our next step as well. So that's where the whole story sits on the table. And this guy here needs to make this reality in the delivery, right? Yes?
George Iwanyc -- Oppenheimer & Co. Inc. -- Analyst
Well, with that, thank you very much, Ira. And again, Doron, congratulations.
Doron Arazi -- Chief Executive Officer
Thank you very much. Thanks.
Ira Palti -- President and Chief Executive Officer
Thanks, George.
Operator
[Audio gap]
Unknown speaker
Hi. Can you hear me? Hi.
Ira Palti -- President and Chief Executive Officer
Hi, Lance.
Unknown speaker
 Congratulations on the quarter. It seems like you guys are executing really well in a challenging environment. And by the way, thank you for doing this call on Zoom. I think this is so much easier than doing the dial in and then waiting for the operator and everything.
So kudos on that. My question is actually just on the balance sheet. I saw that cash increased a little bit despite the fact that you guys are burning a little cash. So presumably, you have some sources of liquidity but $33 million of cash doesn't sound like a lot of money to me.
And so I'm just wondering if you could speak to your additional sources of liquidity. Is Ceragon adequately capitalized given what I think we all agree is a pretty meaningful opportunity here at the advent of 5G?
Ran Vered -- Chief Financial Officer
Hi, Lance. Thanks [Inaudible] So just also to comment on the Zoom call, it's not only Zoom call. All the call was done by 5G handset on 5G network. So this is really exciting -- so just to begin with, so yes, we have $33 million cash available but we also have almost $40 million of available cash revolver that we can utilize for anything that we would like to.
The banks are really -- just a reminder, we had $40 million of credit with the banks, which we increased during the corona crisis last June to $50 million, and we utilized just $11 million out of it. It's more than enough for working capital needs. You can see that we also improved working capital for the last year pretty dramatically. We reduced our inventory levels.
We improved our R&D. So we reduced some of the payables. So I think that the balance sheet and the working capital is pretty strong, and we have the sufficient liquidity to operate.
Unknown speaker
Great, guys. Thanks and congratulations again.
Ran Vered -- Chief Financial Officer
Thanks, Lance.
Ira Palti -- President and Chief Executive Officer
Thanks, Lance.
Operator
Our next question is from the line of Alex Hende