Hi All,
We’ve been doing voip for a while now over our 900/2.4/5.4 and now 3.65 radios. It works pretty well but we have more work to do for tuning. As I continue to work on the network side, I’d love to know what kind of hardware other wisp use for VOIP and data connectivity.
Currently, we use Linksys/cisco SPA2102, PAP2T, PAP 3102 and, for those getting their own on site PBX, we go with polycom sound point IP phones. While the SPA 2102 works, it leaves a lot to be desired as far as co-existing with end user PCs and our network on a 900MHz connection. So, if I may, what do other wisps find works well in place of the PAP2102? I’d love to see a wireless router that supports VOIP lines (well) … basically and all in one box … but the ones we’ve tried in the past have been miserable (Netgear) as both routers and voip solutions.
We have been using grandstream products, no problems and the sound quality is better than pots
We mostly use SPA2102, though we’ll probably switch to SPA122 in the near future. (once they work out the ongoing bugs) We set them on static private IPs, bridging, and place them between SM/CPE and whatever customer equipment is in place. (NOTE: We do NOT provide customers with a router, if we did we’d probably look at Linksys WRP400)
Most of our network is currently Canopy 900mHz, for those we just enable high-priority uplink, dedicate 100kbps up and down for one line, 200kbps for two lines. The SPA2102 already sets DSCP46 on outbound SIP & RTP packets, and we ensure that the VOIP servers here in the shop are also flagged DSCP46. (Default DiffServ settings on Canopy gear put DSCP46 in High-Priority channel - anything >=4 is high-priority if enabled)
PMP320 is quite a bit more of a PITA to get going. It’s a lot more flexible, but much more complex as a consequence. There what I’ve been testing is creating distinct service flows specifically for traffic to/from the IP our customer VOIP gear talks to the server on. (only 1-2 VOIP customers on PMP320s so far, more coming of course)
j
I forgot to note, we do not use CMMs due to there lack of qos control (atleast cmm micro), we use packet flux for timing, and juniper for switching and routing
the 3.65 is great with voip, however it does require a lot more config in the basestations. but well worth the effort.
adeo888 wrote: Hi All,
We've been doing voip for a while now over our 900/2.4/5.4 and now 3.65 radios. It works pretty well but we have more work to do for tuning. As I continue to work on the network side, I'd love to know what kind of hardware other wisp use for VOIP and data connectivity.
Currently, we use Linksys/cisco SPA2102, PAP2T, PAP 3102 and, for those getting their own on site PBX, we go with polycom sound point IP phones. While the SPA 2102 works, it leaves a lot to be desired as far as co-existing with end user PCs and our network on a 900MHz connection. So, if I may, what do other wisps find works well in place of the PAP2102? I'd love to see a wireless router that supports VOIP lines (well) ... basically and all in one box ... but the ones we've tried in the past have been miserable (Netgear) as both routers and voip solutions.
Hi adeo,
I am in the same boat as you right now. What did you end up using for Voip Service CPE? Let me know because this would really be helpful for me getting my Small Business Voip system up and running smoothly.
Thanks
John
john1909 wrote:
Hi adeo,
I am in the same boat as you right now. What did you end up using for VOIP CPE?
Thanks
John
For now, I've gone with the Cisco SPA122. I'm always open to other hardware but this unit has the right price point, reliability and configurability. Our SMs are in bridge mode and we deploy our PAPs in bridge mode as well and before any CPE, so we essentially use 2 IP addresses with the PAP being a private IP. I'd love to say we've had great success with them and I expect we will but we've only deployed a handful of them so far. Of those we've deployed, we've not had one complaint. Given the choice as an admin, I'd rather work with the SPA122 over the SPA2102 or SPA3012 units now that I've played with them. I'm comfortable enough with the 122 on our network that I am working on auto provisioning them (or as semi-auto provisioning as I can get) to make life a littler easier.
We have not come up with any great solutions to replace the PAP2T. My strategy for that one is to not put a voip adapter in an environment where it would need to be placed behind a customer's router or other NAT'd device.
This is a great read. We’re looking at using the same devices in bridged mode as well, running a private subnet alongside the PPPoE that we hand to customers. Glad to hear its working for you.
Regarding the high priority channel, have you guys had any complaints about bandwidth on the AP? We’re probably going to run G.729 but I’m particularly concerned about 900 MHz
salad wrote: This is a great read. We're looking at using the same devices in bridged mode as well, running a private subnet alongside the PPPoE that we hand to customers. Glad to hear its working for you.
Regarding the high priority channel, have you guys had any complaints about bandwidth on the AP? We're probably going to run G.729 but I'm particularly concerned about 900 MHz
I inherited a 900MHz network that wasn't configured for voip at all. Yes, we do get complaints about bandwidth on the APs but we try to avoid voip on APs that are maxed out as far as capacity and that's ultimately where the complaints come from. The network for our customers is still flat ... very flat. I moved the admin of our tower hardware over to a different vlan and secured it for obvious reasons but we still have numerous 900MHz APs on some towers that have 50-60+ SMs connected and provisioned with a minimum of 1.5Mbps/512kbp. They are simply beyond oversubscribed.
BTW, we do not use G.729 yet. its all G.711 ... welcome to my nightmare! I'd love to know how it works for you with G.729 and if you have issues with quality and stability. Are you looking to try G.729 with licenses or try to use the open source asterisk modules and shy away from licensing?
I had no idea G.729 was a licensed codec, we just flip the option on in our SBC and softswitch - no Asterisk here
we run all g711 as well, we don’t have issues over the 900 but one of the major things we did to help out the 900 is preshaping the traffic flow getting to the 900 AP to prevent overload issues.
the switch preshapes 3.25 mbps into the AP leaving a small amount of wasted space but cures an overload 900 AP problem
mgthump wrote: we run all g711 as well, we don't have issues over the 900 but one of the major things we did to help out the 900 is preshaping the traffic flow getting to the 900 AP to prevent overload issues.
the switch preshapes 3.25 mbps into the AP leaving a small amount of wasted space but cures an overload 900 AP problem
I don't want you to give away all your secrets but could I ask about your Juniper gear? Which models are you using and how much gear do you have deployed at a tower? We have at least 1 CMM3 at each tower. It is just not all that wonderful of a solution but we aren't at the point where we can route at every major tower. Soon, I hope, but we are not there yet.