fxo conected to a Huawei LTE

[Rafael Jimenez]

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.

[CHRIS CHAMBERS]

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

[paolo bevilacqua]

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.

[Rafael Jimenez]

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.

[paolo bevilacqua]

"debug vpm signal" with "term mon".

[Rafael Jimenez]

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.

[paolo bevilacqua]

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.

[Rafael Jimenez]

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.

[paolo bevilacqua]

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

[Rafael Jimenez]

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.

[paolo bevilacqua]

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.