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Together with our agents and distributors, we provide convenient local service and quality after-sales maintenance service. The standard service provided is 5×8 (5 days a week, 8 hours a day) technical service support, providing customers with maintenance, repair and remote technical support services through phone and e-mail.

The FAQ section summarizes the solutions to some problems in the installation, configuration and use of New Rock hardware and software products.



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(New Rock Technologies, Inc.) is a new generation of intelligent communication equipment and solution provider. We provide future-oriented intelligent communication products and services to customers such as telecom operators, governments, enterprises, etc.

Since the establishment 19 years ago, New Rock has always taken R&D as our core mission and insisted on independent innovation. New Rock has more than 80 certificates and honors, with 19 years of industry brand recognition and influence, and is the common choice of many customers!

New Rock has established a nationwide service system with Shanghai headquarters as the center and six branches or offices in Beijing, Guangzhou, Shenzhen, Shandong, Wuhan and Chengdu to provide customers with perfect pre-sales consultation and after-sales service.

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News
RTP carries the actual voice in a VoIP call; SRTP encrypts it—so if you secure SIP (signaling) but not RTP (media), your conversations can still be intercepted.
Definition: RTP (Real-time Transport Protocol) delivers audio/video streams; SRTP (Secure RTP) adds encryption, message authentication, and replay protection on top of RTP.
| RTP | SRTP | |
|---|---|---|
| Content | Plain audio packets | Encrypted audio |
| Security | None | Confidentiality + integrity |
| Use case | Trusted LAN | WAN / public internet / compliance |
SIP sets up the call and agrees on codecs and ports; RTP then streams the encoded voice (e.g., G.711/G.729/Opus) between endpoints. SRTP wraps those packets so only the endpoints can decode them.
Newrock OM-series and SBC support SRTP end-to-end and can enforce encrypted media policies, complementing SIP TLS for full call security.
Negligible on modern hardware; the security benefit far outweighs tiny overhead.
No—TLS protects signaling only; SRTP protects the audio itself.
Yes; negotiate it in SDP. Mismatched settings cause one-way or no audio.
ZRTP is another key-agreement method for media; SRTP is the encryption, often paired with SDES or DTLS.
Secure VoIP means securing both signaling (SIP TLS) and media (SRTP). Skipping SRTP leaves the conversation exposed exactly where it matters most.
Tel:021-61202700 / 52217917
Address:5/F Block B, Building 1, No.188 Pingfu Road, Xuhui District, Shanghai 200231, China
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