Protocol / Technology

Compatible Standard

PRA

YDN 034-1997 Technical Specification for ISDN Subscriber-Network Interface, ITU-T G.962, ITU-T I.431, ITU-T Q.921, ITU-T Q.931

QSIG

ITU-T G.962, ITU-T I.431, ITU-T Q.921, ECMA-142, ECMA-143, ECMA-148, ECMA-157, ECMA-163, ECMA-164, ECMA-165, ECMA-173, ECMA-174, ECMA-185, ECMA-186, ECMA-241, ECMA-242

SIP

RFC 3261-3263, RFC 3265, RFC 2976, RFC 3311, RFC 3420, RFC 3515, RFC 3842

SDP

RFC 2327-1998, RFC 3264

T.30

ITU-T T.30

T.38

ITU-T T.38

Echo Cancellation

Oslec

DTMF

•DTMF (dual-tone multi-frequency) detection and reporting, to meet the standard ITU-T Q.23, ITU-T Q.24. Reporting information includes: DTMF corresponding number, signal energy, signal duration

•Supports DTMF transmission via RTP

•Supports RFC 2833

Voice Qos

•Compliant with IEEE 802.1P/Q

•Supports TOS, priority 0-7, service type 0-4

•Supports DSCP, priority 0-63

RTP media stream encryption (SRTP)

Supports AES (128-bit) encryption algorithm

TCP/IP Protocol

•Support IPv4

•UCP1600/UCP2120/UCP4130 currently only support intra-local phone calls in IPv6 (excluding IPSec) scenarios, and do not support coexistence between IPv4 and IPv6.