{"id":5927,"date":"2023-05-16T11:14:35","date_gmt":"2023-05-16T11:14:35","guid":{"rendered":"https:\/\/viptel.hu\/?post_type=product&p=5927"},"modified":"2026-08-05T16:05:36","modified_gmt":"2026-08-05T16:05:36","slug":"grandstream-ht818-telefonadapter","status":"publish","type":"product","link":"https:\/\/viptel.hu\/en\/product\/grandstream-ht818-telefonadapter\/","title":{"rendered":"Grandstream HT818 telephone adapter"},"content":{"rendered":"

>Highlights<\/span>
\n– Support for 2 SIP profiles and 8 FXS ports<\/span>
\n– Dual Gigabit network support<\/span>
\n– High-performance NAT router<\/span>
\n– Automatic provisioning options<\/span>
\n– Support for numerous Caller ID formats<\/span><\/p>\n

> Router features<\/span>
\n– Internal connection<\/span>
\n– Telephony function (VoIP)<\/span><\/p>\n

> System connections<\/span>
\n– Number of 10\/100\/1000 Mbit\/s Ethernet ports: 2<\/span><\/p>\n

> Key features<\/span>
\n– Colour: Black<\/span>
\n– Height: 36 mm<\/span>
\n– Width: 180 mm<\/span>
\n– Depth: 120 mm<\/span>
\n– Weight: 356 g<\/span>
\n– Product type: Gateway<\/span><\/p>\n

> Technical specification<\/span>
\n– Analogue interfaces: 8x RJ11 FXS port<\/span>
\n– Network interfaces: 2x 10\/100\/1000 MBit\/s RJ45 port<\/span>
\n– LED indicators: POWER, LAN, WAN, PHONE1, PHONE 2, PHONE 3, PHONE 4, PHONE 5, PHONE 6, PHONE 7, PHONE 8 – Reset<\/span>
\nbutton: Yes<\/span>
\n– Telephony functions: Caller ID display\/withhold, call waiting, flash, direct or indirect connection, diversion\/forwarding, hold, do not disturb, 3-way conference – Voice codecs: G.711 with Annex I (PLC) and<\/span>
\nAnnex II (VAD\/CNG), G.723.1, G.729A\/B, G.726, iLBC, OPUS, dynamic jitter buffer, advanced line echo cancellation – Fax over IP: T.38 compliant Group 3 fax relay up to 14.4<\/span>
\nkBit\/s and automatic switching to G.711 for fax transmission<\/span>
\n– Short\/long-haul ring load: 2 REN, up to 1 km with 24AWG line<\/span>
\n– Caller ID: Bellcore Type 1 and 2, ETSI, BT, NTT and DTMF-based CID<\/span>
\n– Disconnect methods: busy tone, polarity reversal\/change, loop<\/span>
\n– Network protocols: TCP\/IP\/UDP, RTP\/RTCP, HTTP\/ HTTPS, ARP\/RARP, ICMP, DNS, DHCP, NTP, TFTP, SSH, STUN, SIP (RFC3261), SIP over TCP\/TLS, SRTP, TR-069 – QoS: Layer 2 (802.1Q VLAN, SIP \/RTP<\/span>
\n802.1 p) and Layer 3 (ToS, Diffserv, MPLS)<\/span>
\n– DTMF method: In-Audio, RFC2833 and\/or SIP INFO<\/span>
\n– Provisioning and management: HTTP, HTTPS, SSH, TFTP, TR-069, secure and automatic provisioning with AES encryption, Syslog<\/span>
\n– Media: SRTP<\/span>
\n– Control: TLS\/SIPS\/HTTPS<\/span>
\n– Management: Syslog support, SSH,<\/span><\/p>","protected":false},"excerpt":{"rendered":"

>Kiemel\u00e9sek – 2 SIP profil \u00e9s 8 FXS port t\u00e1mogat\u00e1sa – Dual Gigabit h\u00e1l\u00f3zat t\u00e1mogat\u00e1sa – Nagy teljes\u00edtm\u00e9ny\u0171 NAT \u00fatv\u00e1laszt\u00f3 – Automatikus telep\u00edt\u00e9si lehet\u0151s\u00e9gek – Sz\u00e1mos h\u00edv\u00f3azonos\u00edt\u00f3 form\u00e1tum t\u00e1mogat\u00e1sa ><\/p>","protected":false},"featured_media":5935,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"pwb-brand":[244],"product_brand":[],"product_cat":[245],"product_tag":[],"class_list":["post-5927","product","type-product","status-publish","has-post-thumbnail","pwb-brand-grandstream","product_cat-atjarok-gateway","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"brands":[{"id":244,"name":"Grandstream","slug":"grandstream"}],"_links":{"self":[{"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/product\/5927","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/comments?post=5927"}],"version-history":[{"count":1,"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/product\/5927\/revisions"}],"predecessor-version":[{"id":5937,"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/product\/5927\/revisions\/5937"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/media\/5935"}],"wp:attachment":[{"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/media?parent=5927"}],"wp:term":[{"taxonomy":"pwb-brand","embeddable":true,"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/pwb-brand?post=5927"},{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/product_brand?post=5927"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/product_cat?post=5927"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/viptel.hu\/en\/wp-json\/wp\/v2\/product_tag?post=5927"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}