> --- The issue is that when the alarm panel dials the INVITE from the TA5k > does not contain the correct digits dialed. A couple of digits are missing > for example. Sometimes a call does manage to squeak through properly. If the > digits do get to the Metaswitch properly the call completes fine. Same exact > symptom with GR303. In SAS (meta's service assurance server that contains > debug output) I can clearly review what digits reach the metaswitch via > GR303. In this case I will see missing digits as I know the number the alarm > panel is supposed to dial and a gap of time which should have contained > digits.
OK, so the FXS port of the local Adtran device isn't reliably decoding the DTMF from the panel. Could be frequency, level, or twist. See if there are knobs for receive level and/or impedance for the specific line port used by the panel. I'd start with level, bump it up and down 3dB at a time and see if it starts decoding reliably. If possible bracket it to see where it fails again and set it in the middle. Changing impedance might help if it's twist. Sometimes the options include series capacitance. Likely going to be trial-and-error. ------ That is exactly what we tried. Modifying the settings available in the TA5000. So here is what you have to play with. PLBGNY01AT0#show running-config interface fxs 1/7/23 verbose ! interface fxs 1/7/23 description "default adtran settings shown" impedance 900c rx-gain -4.0 tx-gain -4.0 signaling loop-start alarm enable line-showering alarm enable trunk-conditioning alarm enable over-temperature no shutdown ======================= PLBGNY01AT0(config-fxs 1/7/23)#impedance 600r - 600 Ohms 900c - 900 + 2.16uF auto - Automatically select the impedance z1 - 220 + (820 || 115nF) z2 - 270 + (750 || 150nF) z3 - 270 + (750 || 150nF), Zin = 600 z4 - 320 + (1050 || 230nF) z5 - 350 + (1000 || 210nF), Zin = 600 z6 - 370 + (620 || 310nF) z7 - 800 || (100 + 50nF), Zin = 900 + 2.16uF z8 - 1650 || (100 + 5nF), Zin = 900 + 2.16uF ============================= PLBGNY01AT0(config-fxs 1/7/23)#tx-gain <-6.0-9.0> - Gain in 0.1dB increments PLBGNY01AT0(config-fxs 1/7/23)#rx-gain <-10.0-6.0> - Gain in 0.1dB increments ================== And I hate to say this I brute forced them all pretty much. Tried each impedance. Forced the alarm panel to dial out by disconnecting the battery backup in it. Then adjusted tx and rx gain. For the alarm panel to dial. Etc... I read docs such at this to improve my understanding and many others: https://www.cisco.com/c/en/us/support/docs/voice/ip-telephony-voice-over-ip-voip/64282-impedance-choice.html I never had to try this hard to get a normal pots line working to an alarm panel over copper or T1 delivered pots to a channel bank. Matt -- Jay Hennigan - [email protected] Network Engineering - CCIE #7880 503 897-8550 - WB6RDV _______________________________________________ VoiceOps mailing list [email protected] https://puck.nether.net/mailman/listinfo/voiceops _______________________________________________ VoiceOps mailing list [email protected] https://puck.nether.net/mailman/listinfo/voiceops
