How would you support 100+ analogue devices with no PBX?
-
Saturday, May 12, 2012 3:27 PM
We had this scenario in a project we did for a snom pbx lately:
- Needed to support approx 125 analogue endpoints: combination of Spectralink DECT phones and various analogue deskphones
- Replacing the Spectralink DECT not an option at this point (and main analogue gateway driver)
- The Asterisk PBX server could not be maintained since there would less than 500 extensions overall and did not make sense to maintain new voice and old.
- existing Grandstream gateways needed to be replaced since one of the 5 was failing approx each month
For IP endpoints we used all snom endpoints so the customer could migrate to Lync at some point if they decide to in the future.
It seemed like 5 24port FXS gateways gets to be quite an "octopus" and as more analogue devices it get worse, but that is what we did.
What would you use for a solution in this type senario? Not urgent since we have a solution, just curious the feedback.
+Say thanks and observe basic forum courtesy:
+If this post answered your question, Mark As Answer
+If this post was helpful, Vote as Helpful
windowspbx blog: my thots/howtos
see/submit Lync suggestions here: simple and public- Edited by Matt LandisMVP Saturday, May 12, 2012 3:29 PM
All Replies
-
Sunday, May 13, 2012 7:13 PM
Hi,
I thing I would have gone for something similar to what you did. But I would have gone for the net.com product "Tenor Series AX", where each unit could take up to 48 endpoints (Bringing the number of gateways down to three).
These are registered as csanalogdevices in Lync.
Lasse Wedø,
Blog:Tech@work, Twitter: @lawedo
Please take a second to hit the green arrow on the left if the post was helpful, or mark it as an answer if it resolved your issue. -
Monday, May 14, 2012 5:21 PM
Hi,
What I do is to try to rationalize the analog device usage, replacing the analog by Snom or other Lync phones.
As you said Snom can be useful as they can register to a gateway in a first time, then to Lync in a second time. Also if Lync is deployed, Lync can be the first identity of the Snom phone, and in case of Lync outage, Snom can register to gateway (for example NET UX gateways can manage a failover: UX can see Lync is done, and can reroute call from Snom directly to PSTN, and reverse way, to allow costless failover compared to Lync full redundancy). then using only UX compared to match of Tenor+UX provide administrator same experience of configuration, monitoring and maintenance. And the UX TDM to TDM direct routing allows to have FXS ports for modem too, avoiding useless transcoding like TDM-SIP-TDM.
For the DECT question, I try to keep DECT handphones when possible, just replacing the DECT base stations with SIP compatible one from same constructor or compatible one, registering these base stations to one gateway.
-
Monday, May 14, 2012 6:09 PM
you missed a key part of the requirement: we need to support analogue devices. ;-)
I'm very familiar with snom, but key requirement is to support a lot of analogue devices.
+Say thanks and observe basic forum courtesy:
+If this post answered your question, Mark As Answer
+If this post was helpful, Vote as Helpful
windowspbx blog: my thots/howtos
see/submit Lync suggestions here: simple and public -
Monday, May 14, 2012 6:29 PM
What type of cabling infrastructure are we looking at. Is it all RJ-11 ports? Or are they all being punched down to a 66-block or something along those lines? I like the AudioCodes MP124D because it has a single connectior for 24 lines. (Amphenol/RJ21) You're correct that you'd need 5 gateways though. I'd be curious if the NET Tenor AX with 48 lines is 48 RJ11 ports, or 2 RJ21 ports. The less cables the better imo.
-
Monday, May 14, 2012 6:38 PMI guess you can take a look at it here: http://www.net.com//Product%20Literature/DataSheets/TSAX-DS-0408rev2.pdf 1 50pin RJ21 port it says :)
Lasse Wedø,
Blog:Tech@work, Twitter: @lawedo
Please take a second to hit the green arrow on the left if the post was helpful, or mark it as an answer if it resolved your issue. -
Monday, May 14, 2012 6:39 PM
it doesn't show a 48port fxs, just fxo.
do you know if there actually is a 48 port fxs?
+Say thanks and observe basic forum courtesy:
+If this post answered your question, Mark As Answer
+If this post was helpful, Vote as Helpful
windowspbx blog: my thots/howtos
see/submit Lync suggestions here: simple and public -
Monday, May 14, 2012 6:43 PM
It actually looks like it supports only 24 fxs (my mistake, and you're back to 5 units). But it does support up to 48 in a fxo configuration.
I have not been using this particular device, as a 2 port Tenor usually is enough :)
Lasse Wedø,
Blog:Tech@work, Twitter: @lawedo
Please take a second to hit the green arrow on the left if the post was helpful, or mark it as an answer if it resolved your issue. -
Monday, May 14, 2012 6:45 PMits ok, i consider this brainstorming for a solution. (and it really is likley a exception, rather than rule.)
+Say thanks and observe basic forum courtesy:
+If this post answered your question, Mark As Answer
+If this post was helpful, Vote as Helpful
windowspbx blog: my thots/howtos
see/submit Lync suggestions here: simple and public -
Tuesday, May 15, 2012 3:31 AM
i am working on a solution same as this using Audiocodes. I had to use a Mediant 1000 eSBC and get the MP 124 to be connected to that to support full features such as Forwarding and Symul ringing with Lync.
Also i have 4 analog CO linces which are connected to a FXO module sitting on the M 1000 to support PSTN dialing.
Best thing is that Mp 124 support call pickup within that 24 analog channels which was vital for the deployment where you will not get in NET..
Thamara. MCTS, MCITP Ent Admin, Specialized in U.C Voice OCS 2007 R2 Z-Hire -- Automate IT Account creation process ( AD / Exchange / Lync )
- Edited by Thamara.Wijesinghe Tuesday, May 15, 2012 3:34 AM
-
Tuesday, May 15, 2012 9:39 AMIssue I had with Audiocodes was that enabling SRTP on a Mediant 1000 for Lync connection decreased the analog capacity of the FXS card by 25% (on port disable on each 4 ports card), so I had to disable the SRTP on the Mediant, unsecure situation.
.png)
