How to troubleshoot disconnect signal on Analog or Digital Trunks ? 3

[RogerTurboFederer]

Hi guys,

I´m having problems with some trunks. Apparently, some phone calls didn´t end with a hung up.

Are there any timers to setup ? And where I can obtain this actual timer ?

Do you know how can I troubleshoot this ?

IP Office 500 v2
Release 6.x and up.

Cheers

 

[montyzummer]

On analogue trunks you need your system clear disconnect set to 500m/s, ring the line provider and ask what they are set to, never just say set them to xxxx, when they have confirmed get them to set the clear disconnect to 800m/s, for analogue thats about it, unless you are doing something super fancy, strip it back if you are trying to be clever with AA etc ,get the above settings in place ring a phone hang up and see what happens.

If you have issues on digital trunks thats a whole new ball park, post some monitor traces of the call not clearing , meed more info really on what you are trouble shooting .

APSS (SME)
ACSS (SME)

 

[RogerTurboFederer]

@ montyzummer

Thank you sir.

As for digital trunks I meant E1 or T1.
Info related to disconnect clear should be provided by the Carrier and then adjust IP Office values ?

 

[Westi]

Roger
there are cause codes for T1's do a monitor trace with all ISDN options checked and then you can see them. (cause code 16 is what is usually a normal call disconnect.

0 Unknown.
1 Unallocated (unassigned) number.
2 No route to specific transit network/(5ESS)Calling party off hold.
3 No route to destination / (5ESS) Calling party dropped while on hold.
4 Send special information tone / (NI-2) Vacant Code.
5 Misdialed trunk prefix.
6 Channel unacceptable.
7 Call awarded and being delivered.
8 Preemption/(NI-2)Prefix 0 dialed in error.
9 Preemption, cct reserved / (NI-2) Prefix 1 dialed in error.
10 (NI-2) Prefix 1 not dialed.
11 (NI-2) Excessive digits received call proceeding.
16 Normal call clearing.
17 User busy.
18 No user responding / No response from remote device.
19 No answer from user.
20 Subscriber absent (wireless networks).
21 Call rejected.
22 Number changed.
23 Redirection to new destination.
25 Exchange routing error.
26 Non-selected user clearing.
27 Destination Out Of Order.
28 Invalid number format.
29 Facility rejected.
30 Response to STATUS ENQUIRY.
31 Normal, unspecified.
34 No cct / channel available.
38 Network out of order.
39 Permanent frame mode connection out of service.
40 Permanent frame mode connection is operational.
41 Temporary failure.
42 Switching equipment congestion.
43 Access information discarded.
44 Requested cct / channel not available.
45 Pre-empted.
46 Precedence blocked call.
47 Resources unavailable/(5ESS)New destination.
49 Quality of service unavailable.
50 Requested facility not subscribed.
52 Outgoing calls barred.
54 Incoming calls barred.
57 Bearer capability not authorised.
58 Bearer capability not presently available.
63 Service or option not available, unspecified.
65 Bearer capability not implemented.
66 Channel type not implemented.
69 Requested facility not implemented.
70 Only restricted digital bearer capability is available.
79 Service or option not implemented, unspecified.
81 Invalid call reference.
82 Identified channel does not exist.
83 A suspended call exists, but this id does not.
84 Call id in use.
85 No call suspended.
86 Call having the requested id has been cleared.
87 User not a member of Closed User Group.
88 Incompatible destination.
90 Non-existent Closed User Group.
91 Invalid transit network selection.
95 Invalid message, unspecified.
96 Mandatory information element missing.
97 Message type non-existent/not implemented.
98 Message not compatible with call state, non-existent or not implemented.
99 Information element non-existent or not implemented.
100 Invalid information element contents.
101 Message not compatible with call state / (NI-2) Protocol threshold exceeded.
102 Recovery on timer expiry.
103 Parameter not implemented.
110 Message with unrecognised parameter.
111 Protocol error, unspecified.
117 Parked (Internal IP Office code).
118 UnParked (Internal IP Office code).
119 Pickup (Internal IP Office code).
120 Reminder (Internal IP Office code).
121 Redirect (Internal IP Office code).
122 Call Barred (Internal IP Office code).
123 Forward To Voicemail (Internal IP Office code).
124 Answered By Other (Internal IP Office code).
125 No Account Code (Internal IP Office code).
126 Transfer (Internal IP Office code).
129 Held Call (Internal IP Office code).*
130 Ring Back Check (Internal IP Office code).*
131 Appearance Call Steal (Internal IP Office code).*
132 Appearance Bridge Into (Internal IP Office code).*
133 Bumped Call (Internal IP Office code).*
134 Line Appearance Call (Internal IP Office code).+
135 Unheld Call (Internal IP Office code).+
136 Replace Current Call (Internal IP Office code).+
137 Glare (Internal IP Office code).+
138 R21 Compatible Conf Move (Internal IP Office code).+
139 RingBack Answered (Internal IP Office code).+
140 Transfer Request Failed (Internal IP Office code).+
141 HuntGroup Drop (Internal IP Office code).+


Joe W.

FHandw, ACSS

 

[montyzummer]

Roger,

Disconnect clear is only relevant on analogue trunks , yes always get your servuice provider to supply you with the information first then request the change in my expereience the exchange end will be set to 100m/s (ghost calls etc especially on AA are a issue.)


As for BRI T1/E1 the only thing you want to worry about is is if they are set point to point or point to multipoint, but this should be set up and in default, TEI type is set to 0, line signalling CPE and presumming you are in europe you need to utilise ETSI signalling and make sure youre system has a Alaw card.Oh have CRC checked (cyclic redundancy check) and youre clock quality needs to be network.,........I think thats about all i can think of hope that helps ....cheers for the star.

APSS (SME)
ACSS (SME)