Cisco Small Business Pro SRP 500 Series Services Ready Router as CUCM Gateway

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Sep 21st, 2010
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I need a new ADSL router for home and am looking at the Cisco SRP 527W model.

This unit has one FXO port and two FXS ports.

I am wondering whether it would be possible to use this device as an FXO gateway for a CUCM system. Also would it be possible to connect the SRP 527W to CUCM via a SIP trunk and use it as a poor mans ISR/CUBE?

The documentation around the SIP features of this device is very scanty.

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Overall Rating: 5 (1 ratings)
Steven Holl Wed, 09/22/2010 - 06:57
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Well it doesn't run IOS.  So it isn't going to do CUBE.  It doesn't look like the SRP can act as a SIP proxy, so no dice there.

You can probbly point a SIP trunk to CUCM.  I looked at the admin guide for the SRP500 and I see references to SIP User Agent name, so I assume it acts as a UA which implies that it needs to register to a registrar.  So you'd add it in CUCM as a third party SIP endpoint, so that it can register.

Buy one and test it out, I guess.

James Hawkins Wed, 09/22/2010 - 09:00
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Thanks Steven,

I found the answer about the FXO port - it is there only to act as a relay for the phone connected to the first FXS port if the unit is powered off or no SIP accounts are registered.

I guess I was hoping that it would provide similar functionality to a Fritz!box but I guess that the SRP is aimed at a very different market to that device.

I would love Cisco to launch a smaller UC500 for the SOHO market - say 4 x PoE, 2 x FXS, 2 x FXO, 802.11n and ADSL - if they could sell it for $400 that would be even better


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