Troubleshooting guide

10-4
Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
OL-5169-01
Chapter 10 Troubleshooting the Cisco BTS 10200 Softswitch
Architecture
• Media Gateways Interface to the PSTN—The Cisco BTS 10200 Softswitch provides both
originating and terminating two-wire and four-wire continuity check (COT), a necessary feature
within the PSTN for automatic monitoring of circuit quality. An IOS image that supports the control
protocol is required for use in conjunction with the call agent software.
• Signaling Interfaces—The CA also provides monitoring and control of external NEs. It connects
to multiple networks—using several types of signaling systems—via the Signaling Adapter
Interfaces (SAI) as illustrated in Figure 10-1. The SAI converts incoming and outgoing signaling to
and from the standard internal format of the CA. This interface allows the CA to connect to multiple
networks and exchange signaling messages to set up, tear down and transfer calls.
The types of external signaling supported are:
– SS7
– SIP
– MGCP
– CAS
– ISDN
Figure 10-1 Signaling Adapter Architecture
The signaling adapters provide:
– uniform primitives (indications) for all interactions between different signaling protocols and
the CA modules
– uniform data structures containing common information elements from different signaling
protocols
– call control primitives for exchanging call signaling messages between the CA and the signaling
network
– maintenance primitives for signaling link hardware maintenance and signaling protocol
provisioning
Future
signaling
adapter
Signaling
adapter
SS7
Signaling
adapter
N-ISDN
Signaling
adapter
SIP
Signaling
adapter
CAS
Signaling
adapter
MGCP inband
MGCP
protocol
stack
SIP
protocol
stack
ISDN PRI
protocol
stack
SS7
protocol
stack
TBD
protocol
stack
Signaling adapter interface
Basic call
module
(BCM)
Maintenance
module
(ADM)
Connection
control
module (CNM)
Resource
management
module (RSM)
51393
Signaling
adapter
H.323
H.323
protocol
stack