[cisco-voip] Cisco 2600 VIC-2BRI - no sound

[Guan Yang]

This is one of those "why is there no sound?" questions. My setup is a
Cisco 2611 with NM-2V and VIC-2BRI-S/T-TE. I'm on a Euro-ISDN
(basic-net3) connection. The config's below (phone numbers changed). I've
also attached output of various diagnostic commands below, as well as some
comments at the bottom.

isdn switch-type basic-net3
!
!
!
voice class codec 1
 codec preference 1 g711alaw
 codec preference 2 g729br8
 codec preference 3 g729r8
 codec preference 4 g723r63
 codec preference 5 g723r53
 codec preference 6 g711ulaw
!
voice class codec 2
 codec preference 1 gsmfr
 codec preference 2 gsmefr
!
interface BRI1/0
 no ip address
 no ip route-cache
 isdn switch-type basic-net3
 isdn incoming-voice voice
 isdn answer1 32580600
!
voice-port 1/0/0
 compand-type a-law
 cptone GB
!
dial-peer voice 2 pots
 application session
 incoming called-number 32580600
 destination-pattern T
 direct-inward-dial
 port 1/0/0
!
dial-peer voice 1 voip
 application session
 destination-pattern 32580668
 voice-class codec 1
 session protocol sipv2
 session target sip-server
 session transport udp
!
sip-ua
 sip-server ipv4:192.168.1.106
!

192.168.1.106 is my laptop with Windows XP and a softphone. I've checked
that the softphone (both SJPhone and eStara) work fine by dialing
another Windows box with a softphone. Procedure:

1. I dial my mobile phone by entering sip:12345678 at 192.168.1.102
(12345678 represents my mobile phone number, and 192.168.1.102 is the
router's IP address).

2. The call goes through fine. However there's no sound, whether I
speak into the mobile phone or my laptop's microphone. Output of "show
isdn status":

ISDN BRI1/0 interface
        dsl 1, interface ISDN Switchtype = basic-net3
    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 105, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
    Layer 3 Status:
        1 Active Layer 3 Call(s)
        CCB:callid=16, sapi=0, ces=1, B-chan=1, calltype=VOICE
    Active dsl 1 CCBs = 1
    The Free Channel Mask:  0x80000002

show voice call:

1/0/0 1
      vtsp level 0 state = S_CONNECT
callid 0x8008 B01 state S_TSP_CONNECT clld 12345678 cllg
1/0/0 2  -         -  -
1/0/1 1  -         -  -
1/0/1 2  -         -  -

show voice dsp:

DSP  DSP             DSPWARE CURR  BOOT                         PAK     TX/RX
TYPE NUM CH CODEC    VERSION STATE STATE   RST AI VOICEPORT TS ABORT  PACK
COUNT
==== === == ======== ======= ===== ======= === == ========= == =====
============
C542 001 01 gsmfr     4.1.38 busy  idle      0  0 1/0/0.1   NA     0 
13049/20747

show voice trace 1/0/0:

1/0/0 State Transitions: timestamp (state, event) -> (state, event) ...
8420.532 (S_SETUP_INDICATED, E_CC_PROCEEDING) ->
8420.904 (S_PROCEEDING, E_CC_ALERT) ->
8422.014 (S_ALERTING, E_CC_CONNECT) ->

show rtp call:

No Active calls found

show call active voice brief:

Total call-legs: 2
11FC : 842050hs.1 +151 pid:2 Answer 12345678 active
 dur 00:02:42 tx:7209/237897 rx:4408/145464
 Tele 1/0/0 (28) [1/0/0] tx:162700/44080/0ms gsmfr noise:-71 acom:45 
i/0:-67/-76 dBm

11FC : 842053hs.1 +145 pid:1 Originate 32580600 active
 dur 00:02:42 tx:4408/145464 rx:7209/237897
 IP 192.168.1.106:16384 rtt:0ms pl:10380/17600ms lost:903/1392/1219
delay:70/70/210ms gsmfr


Note that I have one voice-class with G.7xx codecs and another with GSM
codecs. I've tried both. I've also tried SJPhone on Linux.

Could the problem be related to the fact that there's no RTP
connection going on? What's weird is, if I dial digits on my softphone
(I guess DTMF or RFC2833), I can actually here the DTMF tones on my
mobile phone, but not the other way around. I guess this is because
the DTMF is transferred over RFC2833 and outputted by the Cisco box.

Another thing that's weird is the "i/0 -67/-76 dBm" -- what are normal
values for these two figures?

I hope that someone can help.

Guan

PS. I've previously posted this message at comp.dcom.sys.cisco with
slightly different output.