07-28-2009 03:54 AM - edited 03-18-2019 10:29 AM
Hy guys,
As I can see a lot of people have problems with mgcp fax relay unfortunately none of the suggeted configs helped till now.
I have a CM 7 , 2x3845 12.4(24)T, 2xVg224 12.4(24)T. The gateways are registered in CM as MGCP.
My current config looks like this:
ccm-manager redundant-host 10.xx.xx.x 10.xx.x.x
ccm-manager mgcp
no ccm-manager fax protocol cisco
ccm-manager music-on-hold
ccm-manager config server 10.xx.xx.x 10.xx.xx.x
ccm-manager config
!
mgcp
mgcp call-agent 10.xx.xx.x 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode cisco
mgcp modem passthrough voip mode nse
mgcp package-capability rtp-package
mgcp package-capability sst-package
mgcp package-capability pre-package
mgcp default-package fxr-package
no mgcp timer receive-rtcp
mgcp sdp simple
mgcp fax rate 14400
mgcp fax t38 ecm
mgcp fax-relay ans-disable
Thank you for your help.
Solved! Go to Solution.
07-28-2009 04:44 AM
Hi,
You may be hitting a known defect that is pretty popular at the moment: CSCsy29533
It causes MGCP T38 fax to not work on certain versions. I would downgrade IOS to 12.4(15)T9 to avoid this problem.
hth,
nick
07-28-2009 05:26 AM
Hi,
Normally the 'latest and greatest' is a good idea. The problem is sometimes there are new bugs in those versions that are not fixed yet. This is one of those cases.
I would download 12.4(15)T9 onto your MGCP gateway and try this again. The configuration looks correct.
Also, please check 'show controller t1' (or e1) and check for slips. If you have slips you have likely forgotten to use the 'network-clock-select 1 t1 0/0/0' command. If you have slips and that command present, you may have a wiring/provider issue.
hth,
nick
07-28-2009 04:07 AM
Hi Ron,
Here is the Fax Machine settings you asked for:
Also please set Fax machine settings:
- working as a G3 machine and not super G3
- Disable the Error Correcting Mode (ECM)
- fax speed to 9600 bps
Please let me know if this helps?
Test:
- Make test call from Fax Machine to internal extension (Cisco IP Phone)
+ On Cisco IP Phone press the "?" twice, look at call quality and Codec.
Send me the information.
If you dont get a dial tone, change to Callig Search Space to Unrestricted and restart/Reset the port.
Test and let me know...
Many Thanks,
Nico Kotze
07-28-2009 04:44 AM
Hi,
You may be hitting a known defect that is pretty popular at the moment: CSCsy29533
It causes MGCP T38 fax to not work on certain versions. I would downgrade IOS to 12.4(15)T9 to avoid this problem.
hth,
nick
07-28-2009 04:48 AM
Downgrade on VG or routers?
07-28-2009 05:03 AM
Hi Ron,
There are known Bugs that ask to downgrade to avoid possible bugs as certain bugs was introduced in Latter IOS Versions.
I always use the latest like you doing at the moment as above logic only apply up to a certain level and not above.
All confusing I know, but that's human/cisco!!
Many Thanks,
Nico
07-28-2009 05:09 AM
Sry Nico,
i don't really undersatnd what do you mean by "I always use the latest like you doing at the moment as above logic only apply up to a certain level and not above." Can you please explain?
Should i downgrade on the VG's and the routers?
07-28-2009 05:12 AM
Keep with the New/Latest version of IOS and PSTN Router.
07-28-2009 05:23 AM
Update CUCM:
UCSInstall_UCOS_7.0.2.21900-10.sgn.iso_part1of2
Release Date: 15/Jun/2009
Upgrade 2845: Note:- always make sure you have enough memory and the Flash is big enough everything ou upgrade a IOS.
SP SERVICES
c3845-spservicesk9-mz.124-24.T1.bin
Release Date: 23/Jun/2009
Size: 52291.83 KB (53546832 bytes)
Minimum Memory: DRAM:256 MB Flash:64 MB
07-28-2009 05:10 AM
Hi Ron,
- Send me a "sho inv" of the PSTN Gateway Router.
- Version of CUCM?
Nico
07-28-2009 05:15 AM
R-VOCE-E7-SPLAI# sh inv
NAME: "3845 chassis", DESCR: "3845 chassis"
PID: CISCO3845
NAME: "c3845 Motherboard with Gigabit Ethernet on Slot 0", DESCR: "c3845 Motherboard with Gigabit Ethernet"
PID: CISCO3845-MB , VID: V07 ,
NAME: "2nd generation four port FXO voice interface daughtercard on Slot 0 SubSlot 0", DESCR: "2nd generation four port FXO voice interface daughtercard"
PID: VIC2-4FXO , VID: V03 ,
NAME: "2nd generation four port FXO voice interface daughtercard on Slot 0 SubSlot 1", DESCR: "2nd generation four port FXO voice interface daughtercard"
PID: VIC2-4FXO , VID: V03 ,
NAME: "VWIC2-1MFT-T1/E1 - 1-Port RJ-48 Multiflex Trunk - T1/E1 on Slot 0 SubSlot 2", DESCR: "VWIC2-1MFT-T1/E1 - 1-Port RJ-48 Multiflex Trunk - T1/E1"
PID: VWIC2-1MFT-T1/E1 , VID: V01 ,
NAME: "PVDMII DSP SIMM with four DSPs on Slot 0 SubSlot 4", DESCR: "PVDMII DSP SIMM with four DSPs"
PID: PVDM2-64 ,
NAME: "High Density Voice2 Network module with on board two port interface on Slot 1", DESCR: "High Density Voice2 Network module with on board two port interface "
PID: NM-HDV2-2T1/E1 ,
NAME: "PVDMII DSP SIMM with four DSPs on Slot 1 SubSlot 2", DESCR: "PVDMII DSP SIMM with four DSPs"
PID: PVDM2-64 , VID: V01 ,
CUCM 7.0.2.20000-5
Why do you need this info?
07-28-2009 05:26 AM
Hi,
Normally the 'latest and greatest' is a good idea. The problem is sometimes there are new bugs in those versions that are not fixed yet. This is one of those cases.
I would download 12.4(15)T9 onto your MGCP gateway and try this again. The configuration looks correct.
Also, please check 'show controller t1' (or e1) and check for slips. If you have slips you have likely forgotten to use the 'network-clock-select 1 t1 0/0/0' command. If you have slips and that command present, you may have a wiring/provider issue.
hth,
nick
07-28-2009 10:04 PM
This are some shows from one of the Routers
R-VOCE-E7-SPLAI#sh controllers e1
E1 0/2/0 is up.
Applique type is Channelized E1 - balanced
Cablelength is Unknown
Description: ## Romtelecom 1 ##
No alarms detected.
alarm-trigger is not set
Version info Firmware: 20080918, FPGA: 13, spm_count = 0
Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (744 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
51 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
51 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
33352 Line Code Violations, 32 Path Code Violations,
5854 Slip Secs, 1 Fr Loss Secs, 2 Line Err Secs, 0 Degraded Mins,
5854 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 268 Unavail Secs
E1 1/0 is up.
Applique type is Channelized E1 - balanced
Description: ## Romtelecom 2 ##
No alarms detected.
alarm-trigger is not set
Version info Firmware: 20080918, FPGA: 255, spm_count = 0
Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.
Current port master clock:recovered from backplane
Data in current interval (748 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
51 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
51 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
15022 Line Code Violations, 16 Path Code Violations,
5872 Slip Secs, 1 Fr Loss Secs, 2 Line Err Secs, 0 Degraded Mins,
5872 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 13 Unavail Secs
E1 1/1 is up.
Applique type is Channelized E1 - balanced
Description: Description: ## Vodafone 1 ##
No alarms detected.
alarm-trigger is not set
Version info Firmware: 20080918, FPGA: 255, spm_count = 0
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Current port master clock:recovered from backplane
Data in current interval (748 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
51 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
51 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 11 Path Code Violations,
5873 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
5873 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
R-VOCE-E7-SPLAI# sh net
R-VOCE-E7-SPLAI# sh netwo
R-VOCE-E7-SPLAI# sh network-clocks
Network Clock Configuration
---------------------------
Priority Clock Source Clock State Clock Type
11 Backplane GOOD PLL
Current Primary Clock Source
---------------------------
Priority Clock Source Clock State Clock Type
11 Backplane GOOD PLL
R-VOCE-E7-SPLAI#sh run | i clock
clock timezone EET 2
clock summer-time EEST recurring last Sun Mar 2:00 last Sun Oct 4:00
network-clock-participate slot 1
network-clock-participate wic 2
I do have some slips. I don't know if that is too much and if that number of slips affects my fax communciations.
I have 3 E1's on this router from two diffrent providers, with each line getting the clock from the provider. What will the 'network-clock-select' command will do?
I am now downloading 12.4(15)T9 for my VGs and Routers and will come back with a reply as soon as possible(as soon as the client allows me to reload).
07-28-2009 05:30 AM
Hi Ron,
Send us a "sho run" of the PSTN Breakout Router 3845.
Many Thanks,
Nico
07-30-2009 11:57 PM
I downgraded the images to 12.4-15T(9) and the problem seems to be fixed.
Looks like there is indeed a problem with the latest ioses regarding fax relay.
I'd like to thank everyone for their help in solving this problem
Have a nice day & bug free.
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