12-24-2008 01:37 AM - edited 03-15-2019 03:13 PM
CCM---MGCP---ISR(VG)
CCM---SCCP---VG224 (ios12.4.15)
The analog phone is ok.
I want to configure modem passthrough or relay, but I don't know how to setup.
The only document i can find in cisco is that to configure below cli in vg224
'voice service voip
modem relay nse codec g711ulaw gw-controlled'
WHat should i do in ISR and CCM to support modem passthrough or relay?
Solved! Go to Solution.
12-25-2008 08:17 AM
Modem passthrough and fax passthrough use the same set of commands. They are the ones I posted earlier:
On SCCP:
voice service voip
modem passthrough nse codec g711u
fax protocol none
On MGCP:
mgcp modem passthrough voip mode nse
mgcp modem passthrough voip codec g711ulaw
no ccm fax protocol cisco
If you implement these commands instead of the relay command you've configured, both faxes and modems should work. This should be the easiest configuration to get both faxes and modems to work as long as there are no tight bandwidth constraints or 3rd party fax server support.
hth,
nick
12-24-2008 07:11 AM
With MGCP relay is on by default. I would strongly discourage from using SCCP for faxes and modems on the VG224 and use either MGCP or H323 instead. SCCP does not handle faxes very well.
HTH,
Chris
12-24-2008 07:48 AM
Modem passthrough:
On SCCP:
voice service voip
modem passthrough nse codec g711u
fax protocol none
On MGCP:
mgcp modem passthrough voip mode nse
mgcp modem passthrough voip codec g711ulaw
no ccm fax protocol cisco
Also - make sure your T1's don't have any slips with 'show controllers t1'.
hth,
nick
12-24-2008 11:34 PM
Thanks nick.
I used below way:
On VG224 SCCP:
voice service voip
modem relay nse codec g711ulaw gw-controlled
On MGCP:
mgcp modem relay voip mode nse redundancy gw-controlled
Modem is fine by this configution, but Fax on vg224 doesn't work.
what should I do next?
12-24-2008 11:48 PM
and i don't setup any fax related parameters in both MGCP GW(vg224) and SCCP GW (vg224).
I only use the default ones for fax
12-25-2008 12:48 AM
Per checked, fax using cisco protocol in both MGCP GW and SCCP GW,
Now the issue is , the 2 fax machines on VG224 can succeed to fax to each other with the whole number (not just useing the extension number), and the fax machine can send out the fax, but failed to receive.
Pls help.
12-25-2008 01:00 AM
on vg224 when test fax
VG224# show voice dsp
TYPE NUM CH CODEC VERSION STATEâ¦â¦â¦â¦â¦â¦..
===== === === ========= ======= =====
C5510 001 01 g711u 9.4.5 busy
C5510 001 02 g711u 9.4.5 busy
CANH-MTR-V03#sh voice call sum
PORT CODEC VAD VTSP STATE VPM STATE
============== ========= === ==================== ======================
2/7 cisco n S_CONNECT FXSLS_CONNEC
12-25-2008 01:00 AM
@@@@@@@@@@@@@@@@@@
on MGCP GW
sh mgcp
MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE
MGCP call-agent: 192.21.12.12 2427 Initial protocol service is MGCP 0.1
MGCP validate call-agent source-ipaddr DISABLED
MGCP validate domain name DISABLED
MGCP block-newcalls DISABLED
MGCP send SGCP RSIP: forced/restart/graceful/disconnected DISABLED
MGCP quarantine mode discard/step
MGCP quarantine of persistent events is ENABLED
MGCP dtmf-relay voip codec all mode out-of-band
MGCP dtmf-relay for voAAL2 is SDP controlled
MGCP voaal2 modem passthrough disabled
MGCP voip Gateway Controlled Modem Relay: Enabled, Upspeed mode: NSE, Upspeed Codec: g711ulaw,
Redundancy: Enabled
GwXid: Enabled, Dictionary Size: 1024, String Length: 32,
Compression Direction: both, Latency: 200, SPRT Retries: 12
MGCP T.38 Named Signalling Event (NSE) response timer: 200
MGCP Network (IP/AAL2) Continuity Test timer: 200
MGCP 'RTP stream loss' timer disabled
MGCP request timeout 500
MGCP maximum exponential request timeout 4000
MGCP rtp unreachable timeout 1000 action notify
MGCP gateway port: 2427, MGCP maximum waiting delay 3000
MGCP restart delay 0, MGCP vad DISABLED
MGCP rtrcac DISABLED
MGCP system resource check DISABLED
MGCP xpc-codec: DISABLED, MGCP persistent hookflash: DISABLED
MGCP persistent offhook: ENABLED, MGCP persistent onhook: DISABLED
MGCP piggyback msg ENABLED, MGCP endpoint offset DISABLED
MGCP simple-sdp ENABLED
MGCP undotted-notation DISABLED
MGCP codec type g711ulaw, MGCP packetization period 20
MGCP JB threshold lwm 30, MGCP JB threshold hwm 150
MGCP LAT threshold lwm 150, MGCP LAT threshold hwm 300
MGCP PL threshold lwm 1000, MGCP PL threshold hwm 10000
MGCP CL threshold lwm 1000, MGCP CL threshold hwm 10000
MGCP playout mode is adaptive 60, 40, 1000 in msec
MGCP Fax Playout Buffer is 300 in msec
MGCP media (RTP) dscp: ef, MGCP signaling dscp: af31
MGCP default package: trunk-package
MGCP supported packages: gm-package dtmf-package trunk-package line-package
hs-package rtp-package atm-package ms-package dt-package
mo-package mt-package sst-package pre-package md-package
MGCP Digit Map matching order: shortest match
SGCP Digit Map matching order: always left-to-right
MGCP VoAAL2 ignore-lco-codec DISABLED
MGCP T.38 Max Fax Rate is DEFAULT
MGCP T.38 Fax is ENABLED
MGCP T.38 Fax ECM is ENABLED
MGCP T.38 Fax NSF Override is DISABLED
MGCP T.38 Fax Low Speed Redundancy: 0
MGCP T.38 Fax High Speed Redundancy: 0
MGCP Fax relay SG3-to-G3: ENABLED
MGCP control bound to interface GigabitEthernet0/0
MGCP media bound to interface GigabitEthernet0/0
MGCP Upspeed payload type for G711ulaw: 0, G711alaw: 8
MGCP Dynamic payload type for Cisco fax indication: 96, Cisco fax ack: 97
MGCP Static payload type for G.726-16K codec
MGCP Dynamic payload type for G.726-24K codec
MGCP Dynamic payload type for G.726-32K codec
MGCP Dynamic payload type for G.Clear codec
MGCP Dynamic payload type for NSE is 100
MGCP Dynamic payload type for NTE is 99
MGCP rsip-range is enabled for TGCP only.
MGCP Comedia role is NONE
MGCP Comedia check media source is DISABLED
MGCP Comedia SDP force is DISABLED
MGCP Guaranteed scheduler time is DISABLED
MGCP DNS stale threshold is 30 seconds
and when useing "show ccm" on MGCP gw, i saw it use Cisco Protocol ofr fax.
ON CCM-device-gateway, i used g711alaw in Europe, and on MGCP gw using belowing configuration (all IPT is fine )
dspfarm profile 2 transcode
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
maximum sessions 120
associate application SCCP
dspfarm profile 3 mtp
codec g711ulaw
maximum sessions software 120
associate application SCCP
what should i do for this issue?
THanks
12-25-2008 08:17 AM
Modem passthrough and fax passthrough use the same set of commands. They are the ones I posted earlier:
On SCCP:
voice service voip
modem passthrough nse codec g711u
fax protocol none
On MGCP:
mgcp modem passthrough voip mode nse
mgcp modem passthrough voip codec g711ulaw
no ccm fax protocol cisco
If you implement these commands instead of the relay command you've configured, both faxes and modems should work. This should be the easiest configuration to get both faxes and modems to work as long as there are no tight bandwidth constraints or 3rd party fax server support.
hth,
nick
12-25-2008 10:52 PM
Thanks nick.
I have made it by using t.38 fax relay, since cisco fax relay is not supported by VWIC card.
Anyway, thank you for ur help
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