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Beginner

Incoming BRI call from Quescom Q50 to UC540

Hi,

I'm trying to get a Quescom Q50 GSM device to talk to an UC540. The Q50 pretends to be an ISDN line and is connected to the UC540 as such, we don't have any real ISDN lines, and any calls to the ISDN are routed by the Quescom as a GSM call.

Outgoing calls are working fine. I'm having trouble getting incoming calling working.

I've pasted a log sample below. The BAD FRAME errors are apparently because the Q50 doesn't do any CRC.

The Q50 is set to pretend any incoming call is coming into 123456, which you can see in the log. I've got an incoming Dial plan set by CCA on the UC540 with the calling ID of 123456 that routes it to a blast group.

Dialing on the Q50 gets threee rings then a disconnection.

Obviously I've got Quescom looking into this, but would value a second opinion. It would seem the Q50 is behaving correctly, as outgoing calls are fine.

Thanksm

Adam

012907: May 1 16:03:39.826: %LINK-3-UPDOWN: Interface BRI0/1/0, changed state to up

012908: May 1 16:03:40.750: ISDN BR0/1/0 Q921: User RX <- SABMEp sapi=0 tei=0

012909: May 1 16:03:40.750: ISDN BR0/1/0 Q921: User TX -> UAf sapi=0 tei=0

012910: May 1 16:03:40.778: ISDN BR0/1/0 Q921: User TX -> SABMEp sapi=0 tei=0

012911: May 1 16:03:40.782: ISDN BR0/1/0 Q921: User RX <- INFO sapi=0 tei=0, ns=0 nr=0

012912: May 1 16:03:40.782: ISDN BR0/1/0 Q931: SETUP pd = 8 callref = 0x1F

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0x89

Exclusive, B1

Calling Party Number i = 0x80, '07815197604'

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '123456'

Plan:Unknown, Type:Unknown

High Layer Compat i = 0x9181

012913: May 1 16:03:40.786: ISDN BR0/1/0 Q921: User RX <- BAD FRAME(0x020173)

012914: May 1 16:03:41.778: ISDN BR0/1/0 Q921: User TX -> SABMEp sapi=0 tei=0

012915: May 1 16:03:41.786: ISDN BR0/1/0 Q921: User RX <- BAD FRAME(0x020173)

012916: May 1 16:03:42.118: %SYS-5-CONFIG_I: Configured from console by connect on vty0 (192.168.16.18)

012917: May 1 16:03:42.778: ISDN BR0/1/0 Q921: User TX -> SABMEp sapi=0 tei=0

012918: May 1 16:03:42.786: ISDN BR0/1/0 Q921: User RX <- BAD FRAME(0x020173)

012919: May 1 16:03:43.770: ISDN BR0/1/0 Q921: User RX <- INFO sapi=0 tei=0, ns=0 nr=0

012920: May 1 16:03:43.770: ISDN BR0/1/0 Q931: SETUP pd = 8 callref = 0x1F

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0x89

Exclusive, B1

Calling Party Number i = 0x80, '07815197604'

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '123456'

Plan:Unknown, Type:Unknown

High Layer Compat i = 0x9181

012921: May 1 16:03:43.778: ISDN BR0/1/0 Q931: Ux_DLRelInd: DL_REL_IND received from L2

012922: May 1 16:03:43.778: ISDN BR0/1/0 Q921: User TX -> IDVER ri=0 ai=0

012923: May 1 16:03:43.794: ISDN BR0/1/0 Q921: User RX <- IDCKRQ ri=0 ai=0

Everyone's tags (5)
3 REPLIES 3
Hall of Fame Master

Re: Incoming BRI call from Quescom Q50 to UC540

Please send "show run interface bri 0/1/0".

Also clarify if you're using some kind of ethernet cable, or a properly wired BRI cable, that has different pinout and pairs,

Beginner

Incoming BRI call from Quescom Q50 to UC540

Thanks for the reply:

Current configuration : 227 bytes

!

interface BRI0/1/0

no ip address

isdn switch-type basic-net3

isdn overlap-receiving

isdn incoming-voice voice

isdn map address . plan isdn type unknown

isdn sending-complete

isdn static-tei 0

trunk-group ALL_BRI

end

Using an ethernet cable. It was the one that was in place when the ISDN line was in use so I just reused it. From your question can I assume that was a bad thing to do?

Adam

Hall of Fame Master

Incoming BRI call from Quescom Q50 to UC540

Check that the device can be set for dynamic TEI, not static.

You will also not need overlap-receive

You definitely need to use a proper  BRI cable, not Ethernet.