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New Member

fxo conected to a Huawei LTE

I have a huawei lte e5172 router. It come with a telephone jack. An analog phone connected to this port works fine.

My problem is if I connect this port to an fxo port in a cisco 2801 router.

The 2801 with the vic card do not detect that there is a line connected to it. not possible inbound nor outbond calls.

The fxo port is fine, if I connect another line from the pstn or to a sip gateway works fine.

Both the LTE modem and the fxo port in the 2801 works with other brands but not between them.

I need some help with this.

Thanks.

10 REPLIES
New Member

fxo conected to a Huawei LTE

have you tried both loop start and ground start signalling?

Router(config)# voice-port slot/subunit/port

Router(config-voiceport)# signal loop-start | ground-start

http://www.cisco.com/en/US/docs/ios/12_2/voice/configuration/guide/vvfport.html#wp1054950

Hall of Fame Super Gold

Re: fxo conected to a Huawei LTE

CHRIS CHAMBERS wrote:

have you tried both loop start and ground start signalling?

Router(config)# voice-port slot/subunit/port

Router(config-voiceport)# signal loop-start | ground-start

http://www.cisco.com/en/US/docs/ios/12_2/voice/configuration/guide/vvfport.html#wp1054950

Groud start is only for certain special order lines in the USA. It does not apply to any other situation.

New Member

fxo conected to a Huawei LTE

Hello Chris, its me, Rafa!.

Yes, I done everything, but nothing works with this LTE modem.

I have done the same with other analog lines and with other cable-modem with fxs ports connected to the 2801 and works fine.

Hall of Fame Super Gold

fxo conected to a Huawei LTE

"debug vpm signal" with "term mon".

New Member

fxo conected to a Huawei LTE

Sometimes the outgoing calls goes well, but for incoming calls the caller only hear the ring tone, but the router never answer.

the port configuration is:

voice-port 0/1/1

connection plar 5000

caller-id enable

this is the debug command which shows a succesfull outgoing call:

Aug 14 19:47:23.064: htsp_timer_stop3 htsp_setup_req

Aug 14 19:47:23.068: htsp_process_event: [0/1/1, FXOLS_ONHOOK, E_HTSP_SETUP_REQ]fxols_onhook_setup

Aug 14 19:47:23.068: [0/1/1] set signal state = 0xC timestamp = 0

Aug 14 19:47:23.068: htsp_timer - 1300 msec

Aug 14 19:47:23.268: htsp_process_event: [0/1/1, FXOLS_WAIT_DIAL_TONE, E_DSP_SIG_0100]fxols_disc_clear

Aug 14 19:47:23.272: htsp_timer_stop2

Aug 14 19:47:23.272: htsp_timer - 1300 msec

Aug 14 19:47:23.320: htsp_process_event: [0/1/1, FXOLS_WAIT_DIAL_TONE, E_DSP_SIG_1100]fxols_power_denial_detected

Aug 14 19:47:23.324: htsp_timer2 - 1000 msec

Aug 14 19:47:23.324: htsp_timer_stop

Aug 14 19:47:24.324: htsp_process_event: [0/1/1, FXOLS_WAIT_DIAL_TONE, E_HTSP_EVENT_TIMER2]fxols_power_den_disc

Aug 14 19:47:24.324: htsp_timer_stop

Aug 14 19:47:24.324: htsp_timer_stop2

Aug 14 19:47:24.324: [0/1/1] set signal state = 0x4 timestamp = 0

Aug 14 19:47:24.328: htsp_process_event: [0/1/1, FXOLS_ONHOOK, E_HTSP_RELEASE_REQ]fxols_onhook_release

Aug 14 19:47:24.596: htsp_process_event: [0/1/1, FXOLS_ONHOOK, E_DSP_SIG_0000]fxols_onhook_ringing

Aug 14 19:47:24.596: htsp_timer - 125 msec

Aug 14 19:47:24.724: htsp_process_event: [0/1/1, FXOLS_WAIT_RING_MIN, E_HTSP_EVENT_TIMER]fxols_wait_ring_min_timer

Aug 14 19:47:24.724: htsp_timer - 10000 msec

Aug 14 19:47:24.724: htsp_timer3 - 5600 msec

Aug 14 19:47:24.724: [0/1/1] htsp_start_caller_id_rx:BELLCORE

Aug 14 19:47:24.724: htsp_start_caller_id_rx create dsp_stream_manager

Aug 14 19:47:24.724: [0/1/1] htsp_dsm_create_success  returns 1

Aug 14 19:47:30.324: htsp_process_event: [0/1/1, FXOLS_RINGING, E_HTSP_EVENT_TIMER3]fxols_snoop_clid_stop

Aug 14 19:47:30.324: htsp_timer_stop3

Aug 14 19:47:34.724: htsp_process_event: [0/1/1, FXOLS_RINGING, E_HTSP_EVENT_TIMER]fxols_ringing_disc

Aug 14 19:47:34.724: htsp_timer_stop3

Aug 14 19:47:34.724: htsp_timer_stop

Aug 14 19:47:34.724: [0/1/1] htsp_stop_caller_id_rx. message length 0

Aug 14 19:47:34.724: [0/1/1] htsp_dsm_close_done

there is no debug output for the incoming call.

Hall of Fame Super Gold

Re: fxo conected to a Huawei LTE

You can try configuring a different cptone, however the debug indicates many problems including no loop current and ringing detected while doing an outgoing calls, so likely that is not going to work anyway.

New Member

fxo conected to a Huawei LTE

Its a wierd problem related with the LTE modem. This modem has voice system based in SIP.

supposedly it has a normal fxs port, but there are several problems, for example if the outgoing call goes fine, the following problem is the dtmf.

I have to talk with the provider to see how solve those issues.

Hall of Fame Super Gold

Re: fxo conected to a Huawei LTE

They will lilkely tell you that if a phone works, their responsability ends there.

New Member

fxo conected to a Huawei LTE

The provider said that may be is a problem with the 48Volts, because the LTE modem use a 9V AC/DC adapter, and its possible that this device is not able to produce the range of voltages requiered by the vic2 fxo port.

Something weird happened, I confiured the fxo port (in UC520) with anwer supervision (supervisory answer dualtone & supervisory disconnect dualtone mid-call). It worked for several attempts. After that has been imposible get this work again.

With the 2801 It never worked.

Hall of Fame Super Gold

fxo conected to a Huawei LTE

Telephony devices use DC-DC converters. They can produce an higher voltage than the power supply, even if not full 48v. However whatever it does, it is not good enough for the 2801.

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