[cisco-voip] VG224 and vg224-i6k9s-mz.151-3.T2.bin

Thu Oct 27 17:04:03 EDT 2011

http://www.cisco.com/en/US/docs/ios/voice/cube/configuration/guide/vb-gw-config.html#wp1423763

This feature provides support for V.34 fax relay based on the ITU Specification T.38 version 3 (04/2007) and for fax pass-through at SG3 speed. Prior to Cisco IOS Release 15.1(1)T, SG3-to-SG3 calls would fail because the V.34 modulation was not supported. A fallback solution allowed SG3-to-SG3 connections to be made, but the transmission speed was set to G3 levels.

For T.38 fax sessions to operate at SG3 speeds, all the endpoints involved must support T.38 Version 3 (v3) configuration and have negotiated T.38 v3. For example:

Originating Gateway(T.38 v3)—IP-(T.38 v3)Cisco UBE(T.38 v3)-IP—Terminating Gateway(T.38 v3)

In this context, all currently supported Cisco UBE T.38 flows (H.323-H.323, H.323-SIP and SIP-SIP) are supported in Release 15.1(1)T. However, in topologies where at least one endpoint has a T.38 v0 configuration, the Cisco UBE configuration must be T.38 v0 (the lowest common version). Any other combination of T.38 v3 or v0 configuration involved in the Cisco UBE topologies is not supported.

When two endpoints are involved in negotiating the T.38 parameter, the mandatory parameter is the "FaxVersion." That is, when one of the endpoints supports Version 0 (v0), the resulting session operates as a v0 session. As long as Cisco UBE is configured for the lowest common version of the traffic expected, calls are completed successfully.
I

From: Lelio Fulgenzi [mailto:lelio at uoguelph.ca]
Sent: Thursday, October 27, 2011 3:01 PM
To: Nate VanMaren
Cc: cisco-voip (cisco-voip at puck.nether.net); Erick A. Wellnitz
Subject: Re: [cisco-voip] VG224 and vg224-i6k9s-mz.151-3.T2.bin

I think in pre-15 you were bang on, but v15 has had some feature enhancements for faxing.

Is SCCP w/ passthrough supported? Not sure. I'm hoping it is.

It will likely be a try and call the TAC for help when it doesn't work and then argue about whether it is supported or not. ;)

---
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cooking with unix is easy. You just sed it and forget it.
                              - LFJ (with apologies to Mr. Popeil)

________________________________
From: "Nate VanMaren" <VanMarenNP at ldschurch.org<mailto:VanMarenNP at ldschurch.org>>
To: "Lelio Fulgenzi" <lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>>, "Erick A. Wellnitz" <erick.wellnitz at kattenlaw.com<mailto:erick.wellnitz at kattenlaw.com>>
Cc: "cisco-voip (cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>)" <cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>>
Sent: Thursday, October 27, 2011 4:49:20 PM
Subject: RE: [cisco-voip] VG224 and vg224-i6k9s-mz.151-3.T2.bin

I thought SG3 was only for T.38 and only for H.323 and SIP?  (no MGCP, and SCCP t.38 is NSE based which I don’t like)

-Nate

From: cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net> [mailto:cisco-voip-bounces at puck.nether.net]<mailto:[mailto:cisco-voip-bounces at puck.nether.net]> On Behalf Of Lelio Fulgenzi
Sent: Thursday, October 27, 2011 9:10 AM
To: Erick A. Wellnitz
Cc: cisco-voip (cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>)
Subject: Re: [cisco-voip] VG224 and vg224-i6k9s-mz.151-3.T2.bin

We've had pretty good luck setting our fax machines to 14.4 ECM off when using SCCP passthrough. Or was it pass through? Or pass-through? (Anyone remember that thread? ;)

We're currently using 15.0(1)M3 on our VG224s and 15.1(3)T on our gateways. Probably look at upgrading to 15.1(3)T as well if we find some time to test SG3 speeds using passthrough which is apparently supported now.

---
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cooking with unix is easy. You just sed it and forget it.
                              - LFJ (with apologies to Mr. Popeil)
________________________________
From: "Erick A. Wellnitz" <erick.wellnitz at kattenlaw.com<mailto:erick.wellnitz at kattenlaw.com>>
To: "Jason Aarons (AM)" <jason.aarons at dimensiondata.com<mailto:jason.aarons at dimensiondata.com>>
Cc: "cisco-voip (cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>)" <cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>>
Sent: Thursday, October 27, 2011 10:40:03 AM
Subject: Re: [cisco-voip] VG224 and vg224-i6k9s-mz.151-3.T2.bin

We're doing the same but haven't added any analog devices yet.

On Oct 27, 2011, at 9:35 AM, "Jason Aarons (AM)" <jason.aarons at dimensiondata.com<mailto:jason.aarons at dimensiondata.com<mailto:jason.aarons at dimensiondata.com%3cmailto:jason.aarons at dimensiondata.com>>> wrote:

My VG22/SCCP experience is your either have  good luck or your faxing situation turns out really bad.  In 2009 I went thru 6 different IOSs for VG224  before getting becoming caveat free with 12-4.15T6 and hate to repeat that situation.

Combination of Faxing/Modems/Postage/Polycoms, Last very large rollout of VG224s with SCCP (for Supplementary Features)  I used IOS 12.4.15T6 with very good luck, however I’m researching 151-3.T2 and wanted to know if anyone had any feedback, issues or tried this code.

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