The IMG supports interworking between SIP/H.323/SS7/ISDN, including the following support and features:
SS7 ISUP to SIP-T Interworking SIP-T
SIP to SIP-T Interworking. SIP to SIP-T Interworking
E1R2 SS7 to E1R2. E1R2 Interworking Tables
Support of RFC 3666 Call Flows - SIP to PSTN Dialing
UUI Support (ISDN to ISDN,
SIP to SS7 ISUP Interworking: Calling Party Category
Reason Header Interworking (SIP to ISUP and ISUP to SIP)
ISUP to SIP and SIP to ISUP based on RFC 3398
SS7 Parameter Filter / SIP Charge Number (SS7 ISUP to SIP).
UUI Support
Overlap Signaling (Support transmitting and receiving digits from SIP to SS7 and SS7 to SIP)
Dial Around Indicator Interworking. SS7 to SIP
UUI Support
(OLI) Originating Line Information (ISDN to SIP and SIP to ISDN)
UUI Support (ISDN to SIP)