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Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)
The following hardware trace on the Cisco Catalyst 6000 8 Port Voice T1/E1 and Services
Module, indicates that the E1 port 4/1 in the card has registered as a Conference Bridge with
Cisco CallManager.
greece-sup (enable) sh port 4/1
Port Name
Status
----- ------------------ ---------- ---------- ------ ----- ------------
4/1
enabled 1
Port
DHCP MAC-Address
-------- ------- ----------------- --------------- ---------------
4/1
disable 00-10-7b-00-0f-b0 10.200.72.31 255.255.255.0
Port
Call-Manager(s) DHCP-Server
-------- ----------------- --------------- --------------- ---------------
4/1
10.200.72.25
Port
DNS-Server(s)
-------- ----------------- -------------------------------------------------
4/1
-
0.0.0.0
Port
CallManagerState DSP-Type
-------- ---------------- --------
4/1
registered
C549
Port NoiseRegen NonLinearProcessing
----- ---------- -------------------
4/1 disabled disabled
Second, check the maximum number of users configured in the conference (Ad Hoc or
Meet-Me) to determine if the problem occurred because this number was exceeded.
Transcoding Problems
If you have installed a hardware transcoder in the Cisco Catalyst 6000 8 Port Voice T1/E1 and
Services Module, and it doesn't work as expected (meaning you cannot make calls between two
users with no common codec), check to see if you have any available Transcoder resources
registered with Cisco CallManager (must be hardware). Use Microsoft Performance to check the
number of "MediaTermPointsAvailable" available.
One E1 port (WS-X6608-E1 card contains 8x E1 ports) provides Transcoder/MTP resources for
16 calls, as shown in the following trace.
11:51:09.939 Cisco CallManager|MediaTerminationPointControl - Capabilities Received - Device=
MTP00107B000FB1 - Registered - Supports 16 calls
© 2000 Cisco Systems, Inc.
Vlan
Duplex Speed Type
full
- Conf Bridge
IP-Address
TFTP-Server
-
10.200.72.25 -
Domain
Subnet-Mask
Gateway
33
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