Recently I saw that Japan three-network 4837 seemed to have returned, so I bought one to test what is going on. xhj015

Jtti, whose domain was registered on 2022-03-14, previously sold small-bandwidth optimized-route machines and was not very well known. Recently it launched HK&JP return-to-China optimized products advertising "dedicated" 200Mbps bandwidth. The JP route uses 4837 return for all three networks. This reminded me that the old RFCHOST JPCO Clawless also used three-network 4837 return, also had 100Mbps/200Mbps bandwidth, and also promoted something close to dedicated bandwidth in its user group. Combined with upstream JINX, it feels like a spiritual successor to Clawless. yct022

That said, the "dedicated" marketing is a bit too exaggerated: at 35 USD/year plus traffic billing, it is impossible to have that much dedicated China-bound bandwidth. As a machine itself, the value is acceptable; 200Mbps single-thread is enough for daily use, and Unicom/Mobile are also good. However, Jtti is not well known, and this is a non-refundable annual product, so I recommend watching a bit longer.

The provider has mixed reviews; long-term route-machine network performance may not be guaranteed, so be cautious with annual payment; there is no refund policy; the machine was self-purchased and this article has no affiliate links.

(1) Network quality

Speed: consistency between evening peak and daytime off-peak is excellent. In the Pearl River Delta and Yangtze River Delta, single-thread speeds on all three networks reach 160-180Mbps, and cross-network performance is decent.

Latency: Telecom has high latency because return uses cross-network 4837, even though outbound is optimized through CN2. NetQuality also measured serious Telecom return packet loss during the evening peak. Unicom has no cross-network issue, but latency is still 20-30 ms higher than Secretary Gen2/RFCHOST JPCO. Mobile latency is quite low. During the evening peak, latency on all three networks increases slightly.

Routes: return for all three networks is forced through 4837. Telecom outbound uses CN2->NTT, avoiding the Telecom CN2 NCP submarine-cable fault; Unicom outbound uses 4837->NTT, and Mobile outbound uses CMI.

International: despite the small 200Mbps bandwidth, it can almost fully saturate both local and US West destinations. Local latency is 1-2 ms, Seattle is 88-96 ms, and Los Angeles is 100 ms+.

(2) IP quality

IPQuality shows full streaming unlock, with partial local streaming unlock such as DMM. Confusingly, Google geolocates it to Singapore, so the location still needs to be pulled back. There are also forum reports of Google geolocating to China, without locked geolocation, so it depends on luck.

(3) Machine performance

Skylake architecture; CPU and I/O are fine for this price, and the 50G disk is quite generous.

Product Configuration
Plan 🇯🇵 Jtti JP.OP.1C1G
Location Japan, Tokyo
CPU 1 x Intel Xeon Platinum 8168 vCore
RAM 1GB
Disk 50GB
Traffic 1TB(two-way billing)
Peak Bandwidth 200Mbps
Return Route three-network 4837
Outbound Route TelecomCN2/Unicom 4837/Mobile CMI
Network 1 x IPv4
Price Annual USD35.00

Purchase address:https://www.jtti.cc/zh/activity/y2026-anniversary.html

Test Overview
Live Probe YABS Node Quality Mixed Benchmark nws.sh Streaming Unlock
[Link] [Link] [Link] [Link] [Link] [Link]

1. Network Quality

Single-Thread Return-to-China Speed Tests
Evening Peak Off-Peak
NetQuality 
bash ‹(curl -sL https://Check. Place) -N
Evening Peak Off-Peak
Evening Peak Outbound TCP Ping 
Test Site: itdog.cn
Test Time: 2026-03-10 22:00
China Telecom China Unicom China Mobile
Off-Peak Outbound TCP Ping 
Test Site: itdog.cn
Test Time: 2026-03-10 10:00
China Telecom China Unicom China Mobile
Return Routes 
bash ‹(curl -sL https://Check. Place) -N

Outbound Routes 
Test Site: itdog.cn
Test Time: 2026-03-11 19:00
ShanghaiTelecom ShanghaiUnicom Shanghai Mobile
bgp.tools 
Test Site: bgp.tools
Test Time: 2026-03-11 19:00

P.S. You can compare it with RFCHOST's machine: the same international JINX and the same single-line NTT.

Web Latency 
bash <(wget -qO- https://raw.githubusercontent.com/danger-dream/network-latency-tester/main/latency.sh)

International Latency(iplark) 
Test Site: iplark.com
Test Time: 2025-03-11 19:00

Own-node Tests 
Test Method: iPerf3 TCP single-thread & ICMP Ping, one 10-second run
Test Time: 2026-03-11 20:00
iPerf3 ICMP Ping
Cloudflare Local Speed Test 
wget -qO- https://github.com/code-inflation/cfspeedtest/releases/latest/download/cfspeedtest-x86_64-unknown-linux-gnu.tar.gz | tar xz && ./cfspeedtest -n 25; rm ./cfspeedtest

Avg GET request latency 47.77 ms (RTT excluding server processing time)

Type     Payload |  min/max/avg in mbit/s
Download  100KB  |  min 9.10    max 24.26   avg 17.55  
Download  1MB    |  min 78.12   max 112.63  avg 101.28 
Download  10MB   |  min 162.61  max 178.56  avg 174.12 
Upload    100KB  |  min 9.64    max 48.54   avg 37.13  
Upload    1MB    |  min 66.95   max 276.44  avg 205.47 
Upload    10MB   |  min 128.57  max 344.46  avg 216.49
Apple Local Speed Test 
curl -sL nxtrace.org/speedtest | bash

  ▸ Idle Latency
  [+] Endpoint: https://mensura.cdn-apple.com/api/v1/gm/small
  [+] Samples: 20
      ➜  18.36 ms median  (min 16.84 / avg 18.70 / max 25.48)  jitter 0.45 ms

  ▸ Download (single thread)
  [+] Threads: 1
  [+] Limit: 2G / 10s per thread
      ➜  185 Mbps  (225.0 MiB in 10.2s)
  [+] Loaded latency: 38.37 ms  (jitter 0.47 ms)

  ▸ Download (multi-thread)
  [+] Threads: 4
  [+] Limit: 2G / 10s per thread
      ➜  183 Mbps  (224.8 MiB in 10.3s, 4 threads)
  [+] Loaded latency: 46.41 ms  (jitter 0.53 ms)

  ▸ Upload (single thread)
  [+] Threads: 1
  [+] Limit: 2G / 10s per thread
      ➜  203 Mbps  (242.1 MiB in 10.0s)
  [+] Loaded latency: 33.42 ms  (jitter 6.23 ms)

  ▸ Upload (multi-thread)
  [+] Threads: 4
  [+] Limit: 2G / 10s per thread
      ➜  204 Mbps  (246.1 MiB in 10.1s, 4 threads)
  [+] Loaded latency: 50.47 ms  (jitter 0.92 ms)
Speedtest International Test 
curl -sL nws.sh | bash

---------------------------------- nws.sh ---------------------------------
      A simple script to bench network performance using speedtest-cli     
---------------------------------------------------------------------------
 Version            : v2025.11.07
 Global Speedtest   : wget -qO- nws.sh | bash
 Region Speedtest   : wget -qO- nws.sh | bash -s -- -r <region>
 Ping & Routing     : wget -qO- nws.sh | bash -s -- -rt <region>
---------------------------------------------------------------------------
 Speedtest.net (Region: GLOBAL)
---------------------------------------------------------------------------
 Location         Latency     Loss    DL Speed       UP Speed       Server      

 ISP: Jt Telecom International Pte.ltd. 

 Nearest          1.02 ms     N/A     189.68 Mbps    204.18 Mbps    GSL Networks - Tokyo 

 Bangalore, IN    103.91 ms   0.0%    192.17 Mbps    204.51 Mbps    Bharti Airtel Ltd - Bangalore 
 Chennai, IN      126.97 ms   0.0%    193.03 Mbps    203.27 Mbps    RailTel Corporation of India Ltd - Chennai 
 Mumbai, IN       137.64 ms   0.0%    207.74 Mbps    202.08 Mbps    Melbicom - Mumbai 

 Seattle, US      92.49 ms    N/A     191.92 Mbps    198.56 Mbps    Comcast - Seattle, WA 
 Los Angeles, US  105.37 ms   0.0%    193.90 Mbps    205.39 Mbps    ReliableSite Hosting - Los Angeles, CA 
 Dallas, US       142.62 ms   0.0%    192.56 Mbps    197.35 Mbps    Hivelocity - Dallas, TX 
 Miami, US        213.83 ms   0.0%    178.21 Mbps    198.41 Mbps    Frontier - Miami, FL 
 New York, US     144.09 ms   0.0%    192.47 Mbps    197.99 Mbps    GSL Networks - New York, NY 
 Toronto, CA      174.48 ms   0.0%    195.12 Mbps    198.13 Mbps    Rogers - Toronto, ON 
 Mexico City, MX  138.93 ms   0.0%    194.33 Mbps    207.36 Mbps    INFINITUM - Ciudad de México 

 London, UK       221.23 ms   0.0%    174.88 Mbps    187.10 Mbps    VeloxServ Communications - London 
 Amsterdam, NL    FAILED                                                        
 Paris, FR        220.22 ms   0.0%    192.38 Mbps    201.23 Mbps    Scaleway - Paris 
 Frankfurt, DE    230.12 ms   0.0%    194.52 Mbps    206.52 Mbps    Clouvider Ltd - Frankfurt am Main 
 Warsaw, PL       259.81 ms   0.0%    163.23 Mbps    197.89 Mbps    Play - Warszawa 
 Bucharest, RO    253.57 ms   0.0%    188.98 Mbps    203.47 Mbps    Digi        
 Moscow, RU       FAILED                                                        

 Jeddah, SA       179.78 ms   0.0%    207.55 Mbps    207.23 Mbps    Saudi Telecom Company 
 Dubai, AE        147.75 ms   N/A     203.63 Mbps    223.61 Mbps    e& UAE - Dubai 
 Istanbul, TR     273.51 ms   0.0%    170.98 Mbps    194.79 Mbps    Turkcell - Istanbul 
 Tehran, IR       FAILED                                                        
 Cairo, EG        278.84 ms   0.0%    193.52 Mbps    195.49 Mbps    Telecom Egypt - Cairo 

 Tokyo, JP        FAILED                                                        
 Shanghai, CU-CN  59.96 ms    N/A     191.67 Mbps    201.24 Mbps    China Unicom 5G - Shanghai 
 Hong Kong, CN    46.75 ms    0.0%    209.72 Mbps    93.15 Mbps     Misaka Network, Inc. - Hong Kong 
 Singapore, SG    74.03 ms    0.0%    193.38 Mbps    202.77 Mbps    ViewQwest - Singapore 
 Jakarta, ID      79.31 ms    0.0%    191.92 Mbps    203.25 Mbps    PT Solnet Indonesia - Jakarta 

 Sydney, AU       172.73 ms   0.0%    202.40 Mbps    193.59 Mbps    Aussie Broadband - Sydney 
---------------------------------------------------------------------------
 Avg DL Speed       : 192.00 Mbps
 Avg UL Speed       : 197.14 Mbps

 Total DL Data      : 6.78 GB
 Total UL Data      : 6.63 GB
 Total Data         : 13.42 GB
---------------------------------------------------------------------------
 Duration           : 12 min 30 sec
 System Time        : 10/03/2026 - 19:13:40 CST
 Total Script Runs  : 520831
---------------------------------------------------------------------------
 Result             : https://result.nws.sh/r/1773141221_81R641_GLOBAL.txt
---------------------------------------------------------------------------

2. IP Quality

IPQuality 
bash ‹(curl -sL https://Check. Place) -I

Streaming Unlock 
bash <(curl -L -s check.unlock.media)

Common IP Database Checks 
export noninteractive=true && curl -L https://raw.githubusercontent.com/oneclickvirt/ecs/master/goecs.sh -o goecs.sh && chmod +x goecs.sh && ./goecs.sh install && goecs

--------------------------------------IP Quality Check--------------------------------------
The following are database IDs; results include the corresponding source database IDs
ipinfo Database  [0] | scamalytics Database [1] | virustotal Database   [2] | abuseipdb Database   [3] | ip2location Database    [4]
ip-api Database  [5] | ipwhois Database     [6] | ipregistry Database   [7] | ipdata Database      [8] | db-ip Database          [9]
ipapiis Database [A] | ipapicom Database    [B] | bigdatacloud Database [C] | dkly Database        [D] | ipqualityscore Database [E]
ipintel Database [F] | ipfighter Database   [G] | fraudlogix Database   [H] | cloudflare Database  [I] |
IPv4:
Security Score:
Trust Score(higher is better): 100 [8]
VPN Score(lower is better): 0 [8] 
Proxy Score(lower is better): 0 [8] 
Community Votes - Harmless: 0 [2] 
Community Votes - Malicious: 0 [2] 
Threat Score(lower is better): 1 [8] 
Fraud Score(lower is better): 0 [E] 
Abuse Score(lower is better): 0 [3] 
ASN Abuse Score(lower is better): 0.005 (Low) [A] 
Company Abuse Score(lower is better): 0.002 (Low) [A] 
Threat Level: low [9 B] 
Traffic Share: Human(higher is better)20% [I] Bot(lower is better)79% [I]
Blacklist Record Statistics (number of blacklist sites with records):
Harmless Records: 0 [2]  Malicious Records: 0 [2]  Suspicious Records: 0 [2]  No-record Count: 94 [2] 
Security Info:
Usage Type: isp [0 3 7 A] unknown [8 C] business [9]
Company Type: government [A] business [0] hosting [7]
Browser Type: Mainstream94% Other5% [I] 
Device Type: Desktop96% Mobile3% Other0% [I] 
OS Type: Mainstream96% Other3% [I] 
Is Cloud Provider: Yes [7 D] 
Is Data Center: No [0 5 8 A C G]
Is Mobile Device: No [5 A C G] Yes [E]
Is Proxy: No [0 4 5 7 8 9 A B C D E] Yes [G]
Is VPN: No [0 7 A C D E G] 
Is Tor: No [0 3 7 8 A B C D E] 
Is Tor Exit: No [7 D] 
Is Web Crawler: No [9 A B E] 
Is Anonymous: No [7 8 D] 
Is Attacker: No [7 8 D] 
Is Abuser: No [7 8 A C D E] 
Is Threat: No [7 8 C D] 
Is Relay: No [0 7 8 C D] 
Is Bogon: No [7 8 A C D] 
Is Bot: No [E] 
DNS Blacklist: 309(Total_Check) 0(Clean) 8(Blacklisted) 12(Other)
iplark Check Score 
Test Site: iplark.com
Test Time: 2026-03-11 19:00

3. Machine Performance

HardwareQuality 
bash ‹(curl -sL https://Check. Place) -I

YABS 
curl -sL https://yabs.sh | bash -s -- -5 -i

# ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## #
#              Yet-Another-Bench-Script              #
#                     v2025-04-20                    #
# https://github.com/masonr/yet-another-bench-script #
# ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## #

Wed Mar 11 09:09:19 PM CST 2026

Basic System Information:
---------------------------------
Uptime     : 1 days, 21 hours, 39 minutes
Processor  : Intel(R) Xeon(R) Platinum 8168 CPU @ 2.70GHz
CPU cores  : 1 @ 2693.670 MHz
AES-NI     : ✔ Enabled
VM-x/AMD-V : ✔ Enabled
RAM        : 949.5 MiB
Swap       : 1024.0 MiB
Disk       : 48.9 GiB
Distro     : Debian GNU/Linux 13 (trixie)
Kernel     : 6.12.63+deb13-cloud-amd64
VM Type    : KVM
IPv4/IPv6  : ✔ Online / ❌ Offline

IPv4 Network Information:
---------------------------------
ISP        : JT TELECOM INTERNATIONAL PTE.LTD.
ASN        : AS137535 JT TELECOM INTERNATIONAL PTE.LTD.
Host       : Hong Kong Communications International Co., Limited
Location   : Tokyo, Tokyo (13)
Country    : Japan

fio Disk Speed Tests (Mixed R/W 50/50) (Partition /dev/sda2):
---------------------------------
Block Size | 4k            (IOPS) | 64k           (IOPS)
  ------   | ---            ----  | ----           ---- 
Read       | 40.01 MB/s   (10.0k) | 553.34 MB/s   (8.6k)
Write      | 40.11 MB/s   (10.0k) | 556.25 MB/s   (8.6k)
Total      | 80.13 MB/s   (20.0k) | 1.10 GB/s    (17.3k)
           |                      |                     
Block Size | 512k          (IOPS) | 1m            (IOPS)
  ------   | ---            ----  | ----           ---- 
Read       | 1.01 GB/s     (1.9k) | 1.00 GB/s      (978)
Write      | 1.06 GB/s     (2.0k) | 1.06 GB/s     (1.0k)
Total      | 2.08 GB/s     (4.0k) | 2.07 GB/s     (2.0k)

Geekbench 5 Benchmark Test:
---------------------------------
Test            | Value                         
                |                               
Single Core     | 820                           
Multi Core      | 829                           
Full Test       | https://browser.geekbench.com/v5/cpu/24171810

YABS completed in 3 min 26 sec

4. Appended at the End

About the Tests

The machines used in this test were purchased at my own expense; results may be time-sensitive.

Kernel parameters of the test machines (/etc/sysctl.conf) are as follows:

fs.file-max = 6815744
net.ipv4.tcp_no_metrics_save=1
net.ipv4.tcp_ecn=0
net.ipv4.tcp_frto=0
net.ipv4.tcp_mtu_probing=0
net.ipv4.tcp_rfc1337=0
net.ipv4.tcp_sack=1
net.ipv4.tcp_fack=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_adv_win_scale=1
net.ipv4.tcp_moderate_rcvbuf=1
net.core.rmem_max=33554432
net.core.wmem_max=33554432
net.ipv4.tcp_rmem=4096 87380 33554432
net.ipv4.tcp_wmem=4096 16384 33554432
net.ipv4.udp_rmem_min=8192
net.ipv4.udp_wmem_min=8192
net.ipv4.ip_forward=1
net.ipv4.conf.all.route_localnet=1
net.ipv4.conf.all.forwarding=1
net.ipv4.conf.default.forwarding=1
net.core.default_qdisc=fq
net.ipv4.tcp_congestion_control=bbr
net.ipv6.conf.all.forwarding=1
net.ipv6.conf.default.forwarding=1
Acknowledgements

Thanks to the administrators and volunteers of Haoyong Aiyong for providing public-interest speed test services; thanks to itdog.cn and iplark.com and the contributors of the test scripts

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